diff --git a/package-lock.json b/package-lock.json
index fb640ba..1826545 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -140,7 +140,8 @@
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@@ -208,7 +209,8 @@
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@@ -561,6 +564,7 @@
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@@ -576,6 +580,7 @@
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           "integrity": "sha1-dp66rz9KY6rTr56NMEybvnm/sOY=",
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@@ -584,6 +589,24 @@
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@@ -616,6 +639,7 @@
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@@ -715,6 +739,7 @@
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@@ -731,7 +756,8 @@
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       "dev": true,
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@@ -857,6 +885,7 @@
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@@ -866,6 +895,7 @@
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@@ -886,6 +917,7 @@
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@@ -895,6 +927,7 @@
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@@ -906,6 +939,7 @@
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@@ -916,13 +950,15 @@
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-          "dev": true
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@@ -988,15 +1024,25 @@
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       "integrity": "sha1-S8A3PBZLwykbTTaMgpzxqApZ3KA=",
       "dev": true,
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-      "integrity": "sha1-BDP0TYCWgP3rYO0mDxsMJi6CpAs=",
+    "color-convert": {
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+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
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+      "dev": true,
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
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@@ -1021,7 +1067,8 @@
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       "integrity": "sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=",
-      "dev": true
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@@ -1085,7 +1132,8 @@
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       "integrity": "sha1-Z29us8OZl8LuGsOpJP1hJHSPV40=",
-      "dev": true
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@@ -1103,7 +1151,7 @@
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-      "integrity": "sha1-jtolLsqrWEDc2XXOuQ2TcMgZ/4c=",
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@@ -1189,13 +1237,15 @@
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-      "dev": true
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@@ -1205,7 +1255,8 @@
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-          "dev": true
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@@ -1253,18 +1304,6 @@
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-      "integrity": "sha1-HIaZHYFq0eUEdQ5zh0Ik7PO+xQg=",
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       "integrity": "sha1-Jqcarwc7OfshJxcnRhMcJwQCjbg=",
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@@ -1427,6 +1468,7 @@
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-          "dev": true
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@@ -1860,6 +1904,12 @@
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+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.2.tgz",
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@@ -1937,7 +1988,8 @@
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@@ -1988,7 +2040,8 @@
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@@ -2003,6 +2056,7 @@
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@@ -2011,6 +2065,7 @@
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@@ -2019,6 +2074,7 @@
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@@ -2027,7 +2083,8 @@
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@@ -2044,12 +2101,14 @@
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@@ -2057,22 +2116,26 @@
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@@ -2112,7 +2175,8 @@
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@@ -2144,7 +2208,8 @@
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@@ -2166,12 +2231,14 @@
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@@ -2227,6 +2294,7 @@
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@@ -2239,7 +2307,8 @@
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@@ -2267,6 +2336,7 @@
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@@ -2277,7 +2347,8 @@
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@@ -2294,6 +2365,7 @@
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@@ -2302,7 +2374,8 @@
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@@ -2314,6 +2387,7 @@
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         "mkdirp": "0.5.1",
@@ -5878,6 +6143,7 @@
       "resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-1.5.5.tgz",
       "integrity": "sha512-mQdgLPc/Vjfr3VWqWbfxW8yQNiJCbAZ+Gf6GDu1Cy0bdb33ofyiNGBtAY96jHFhDuivCwgW1H9DgTON+INiXgg==",
       "dev": true,
+      "optional": true,
       "requires": {
         "bl": "1.2.2",
         "end-of-stream": "1.4.1",
@@ -5903,6 +6169,7 @@
       "resolved": "https://registry.npmjs.org/to-object-path/-/to-object-path-0.3.0.tgz",
       "integrity": "sha1-KXWIt7Dn4KwI4E5nL4XB9JmeF68=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "3.2.2"
       }
@@ -5912,6 +6179,7 @@
       "resolved": "https://registry.npmjs.org/to-regex/-/to-regex-3.0.2.tgz",
       "integrity": "sha512-FWtleNAtZ/Ki2qtqej2CXTOayOH9bHDQF+Q48VpWyDXjbYxA4Yz8iDB31zXOBUlOHHKidDbqGVrTUvQMPmBGBw==",
       "dev": true,
+      "optional": true,
       "requires": {
         "define-property": "2.0.2",
         "extend-shallow": "3.0.2",
@@ -5962,6 +6230,7 @@
       "resolved": "https://registry.npmjs.org/traceur/-/traceur-0.0.105.tgz",
       "integrity": "sha1-XPne6D1rd4YcPWxE1ThZrterBHk=",
       "dev": true,
+      "optional": true,
       "requires": {
         "commander": "2.9.0",
         "glob": "5.0.15",
@@ -5975,6 +6244,7 @@
           "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
           "integrity": "sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=",
           "dev": true,
+          "optional": true,
           "requires": {
             "inflight": "1.0.6",
             "inherits": "2.0.3",
@@ -5987,7 +6257,8 @@
           "version": "4.3.6",
           "resolved": "https://registry.npmjs.org/semver/-/semver-4.3.6.tgz",
           "integrity": "sha1-MAvG4OhjdPe6YQaLWx7NV/xlMto=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -6088,20 +6359,12 @@
       "optional": true
     },
     "union": {
-      "version": "0.4.6",
-      "resolved": "https://registry.npmjs.org/union/-/union-0.4.6.tgz",
-      "integrity": "sha1-GY+9rrolTniLDvy2MLwR8kopWeA=",
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/union/-/union-0.5.0.tgz",
+      "integrity": "sha512-N6uOhuW6zO95P3Mel2I2zMsbsanvvtgn6jVqJv4vbVcz/JN0OkL9suomjQGmWtxJQXOCqUJvquc1sMeNz/IwlA==",
       "dev": true,
       "requires": {
-        "qs": "2.3.3"
-      },
-      "dependencies": {
-        "qs": {
-          "version": "2.3.3",
-          "resolved": "https://registry.npmjs.org/qs/-/qs-2.3.3.tgz",
-          "integrity": "sha1-6eha2+ddoLvkyOBHaghikPhjtAQ=",
-          "dev": true
-        }
+        "qs": "^6.4.0"
       }
     },
     "union-value": {
@@ -6109,6 +6372,7 @@
       "resolved": "https://registry.npmjs.org/union-value/-/union-value-1.0.0.tgz",
       "integrity": "sha1-XHHDTLW61dzr4+oM0IIHulqhrqQ=",
       "dev": true,
+      "optional": true,
       "requires": {
         "arr-union": "3.1.0",
         "get-value": "2.0.6",
@@ -6121,6 +6385,7 @@
           "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-2.0.1.tgz",
           "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
           "dev": true,
+          "optional": true,
           "requires": {
             "is-extendable": "0.1.1"
           }
@@ -6130,6 +6395,7 @@
           "resolved": "https://registry.npmjs.org/set-value/-/set-value-0.4.3.tgz",
           "integrity": "sha1-fbCPnT0i3H945Trzw79GZuzfzPE=",
           "dev": true,
+          "optional": true,
           "requires": {
             "extend-shallow": "2.0.1",
             "is-extendable": "0.1.1",
@@ -6144,6 +6410,7 @@
       "resolved": "https://registry.npmjs.org/unset-value/-/unset-value-1.0.0.tgz",
       "integrity": "sha1-g3aHP30jNRef+x5vw6jtDfyKtVk=",
       "dev": true,
+      "optional": true,
       "requires": {
         "has-value": "0.3.1",
         "isobject": "3.0.1"
@@ -6154,6 +6421,7 @@
           "resolved": "https://registry.npmjs.org/has-value/-/has-value-0.3.1.tgz",
           "integrity": "sha1-ex9YutpiyoJ+wKIHgCVlSEWZXh8=",
           "dev": true,
+          "optional": true,
           "requires": {
             "get-value": "2.0.6",
             "has-values": "0.1.4",
@@ -6165,6 +6433,7 @@
               "resolved": "https://registry.npmjs.org/isobject/-/isobject-2.1.0.tgz",
               "integrity": "sha1-8GVWEJaj8dou9GJy+BXIQNh+DIk=",
               "dev": true,
+              "optional": true,
               "requires": {
                 "isarray": "1.0.0"
               }
@@ -6175,13 +6444,15 @@
           "version": "0.1.4",
           "resolved": "https://registry.npmjs.org/has-values/-/has-values-0.1.4.tgz",
           "integrity": "sha1-bWHeldkd/Km5oCCJrThL/49it3E=",
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "isobject": {
           "version": "3.0.1",
           "resolved": "https://registry.npmjs.org/isobject/-/isobject-3.0.1.tgz",
           "integrity": "sha1-TkMekrEalzFjaqH5yNHMvP2reN8=",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -6189,12 +6460,13 @@
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/urix/-/urix-0.1.0.tgz",
       "integrity": "sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "url-join": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/url-join/-/url-join-1.1.0.tgz",
-      "integrity": "sha1-dBxsL0WWxIMNZxhGCSDQySIC3Hg=",
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/url-join/-/url-join-4.0.1.tgz",
+      "integrity": "sha512-jk1+QP6ZJqyOiuEI9AEWQfju/nB2Pw466kbA0LEZljHwKeMgd9WrAEgEGxjPDD2+TNbbb37rTyhEfrCXfuKXnA==",
       "dev": true
     },
     "use": {
@@ -6202,6 +6474,7 @@
       "resolved": "https://registry.npmjs.org/use/-/use-3.1.0.tgz",
       "integrity": "sha512-6UJEQM/L+mzC3ZJNM56Q4DFGLX/evKGRg15UJHGB9X5j5Z3AFbgZvjUh2yq/UJUY4U5dh7Fal++XbNg1uzpRAw==",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "6.0.2"
       },
@@ -6210,7 +6483,8 @@
           "version": "6.0.2",
           "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-6.0.2.tgz",
           "integrity": "sha512-s5kLOcnH0XqDO+FvuaLX8DDjZ18CGFk7VygH40QoKPUQhW4e2rvM0rwUq0t8IQDOwYSeLK01U90OjzBTme2QqA==",
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -6296,6 +6570,15 @@
       "dev": true,
       "optional": true
     },
+    "whatwg-encoding": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-2.0.0.tgz",
+      "integrity": "sha512-p41ogyeMUrw3jWclHWTQg1k05DSVXPLcVxRTYsXUk+ZooOCZLcoYgPZ/HL/D/N+uQPOtcp1me1WhBEaX02mhWg==",
+      "dev": true,
+      "requires": {
+        "iconv-lite": "0.6.3"
+      }
+    },
     "when": {
       "version": "3.7.8",
       "resolved": "https://registry.npmjs.org/when/-/when-3.7.8.tgz",
@@ -6381,7 +6664,8 @@
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.1.tgz",
       "integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "y18n": {
       "version": "3.2.1",
diff --git a/package.json b/package.json
index 1e20eac..84a46b9 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "concise-cli": "^0.3.0",
     "concise-utils": "^1.0.0",
     "concise.css": "^4.0.0",
-    "http-server": "^0.9.0",
+    "http-server": "^14.1.1",
     "jake": "^8.0.14",
     "livereload": "^0.5.0",
     "pug-cli": "^1.0.0-alpha6"
diff --git a/yarn.lock b/yarn.lock
index 7fe0b6d..abfefd2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -57,6 +57,12 @@ ansi-styles@^2.2.1:
   version "2.2.1"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-2.2.1.tgz#b432dd3358b634cf75e1e4664368240533c1ddbe"
 
+ansi-styles@^4.1.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-4.3.0.tgz#edd803628ae71c04c85ae7a0906edad34b648937"
+  dependencies:
+    color-convert "^2.0.1"
+
 ansi-styles@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-1.0.0.tgz#cb102df1c56f5123eab8b67cd7b98027a0279178"
@@ -141,14 +147,16 @@ async-foreach@^0.1.3:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/async-foreach/-/async-foreach-0.1.3.tgz#36121f845c0578172de419a97dbeb1d16ec34542"
 
-async@0.9.0:
-  version "0.9.0"
-  resolved "https://registry.yarnpkg.com/async/-/async-0.9.0.tgz#ac3613b1da9bed1b47510bb4651b8931e47146c7"
-
 async@0.9.x:
   version "0.9.2"
   resolved "https://registry.yarnpkg.com/async/-/async-0.9.2.tgz#aea74d5e61c1f899613bf64bda66d4c78f2fd17d"
 
+async@^2.6.4:
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
+  dependencies:
+    lodash "^4.17.14"
+
 asynckit@^0.4.0:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/asynckit/-/asynckit-0.4.0.tgz#c79ed97f7f34cb8f2ba1bc9790bcc366474b4b79"
@@ -334,6 +342,12 @@ balanced-match@^0.4.1:
   version "0.4.2"
   resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-0.4.2.tgz#cb3f3e3c732dc0f01ee70b403f302e61d7709838"
 
+basic-auth@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/basic-auth/-/basic-auth-2.0.1.tgz#b998279bf47ce38344b4f3cf916d4679bbf51e3a"
+  dependencies:
+    safe-buffer "5.1.2"
+
 bcrypt-pbkdf@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz#63bc5dcb61331b92bc05fd528953c33462a06f8d"
@@ -421,6 +435,13 @@ builtin-modules@^1.0.0:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/builtin-modules/-/builtin-modules-1.1.1.tgz#270f076c5a72c02f5b65a47df94c5fe3a278892f"
 
+call-bind@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/call-bind/-/call-bind-1.0.2.tgz#b1d4e89e688119c3c9a903ad30abb2f6a919be3c"
+  dependencies:
+    function-bind "^1.1.1"
+    get-intrinsic "^1.0.2"
+
 camelcase-keys@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/camelcase-keys/-/camelcase-keys-2.1.0.tgz#308beeaffdf28119051efa1d932213c91b8f92e7"
@@ -473,6 +494,13 @@ chalk@^1.0.0, chalk@^1.1.0, chalk@^1.1.1, chalk@^1.1.3:
     strip-ansi "^3.0.0"
     supports-color "^2.0.0"
 
+chalk@^4.1.2:
+  version "4.1.2"
+  resolved "https://registry.yarnpkg.com/chalk/-/chalk-4.1.2.tgz#aac4e2b7734a740867aeb16bf02aad556a1e7a01"
+  dependencies:
+    ansi-styles "^4.1.0"
+    supports-color "^7.1.0"
+
 character-parser@^2.1.1:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/character-parser/-/character-parser-2.2.0.tgz#c7ce28f36d4bcd9744e5ffc2c5fcde1c73261fc0"
@@ -548,9 +576,15 @@ code-point-at@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
 
-colors@1.0.3:
-  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/colors/-/colors-1.0.3.tgz#0433f44d809680fdeb60ed260f1b0c262e82a40b"
+color-convert@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-2.0.1.tgz#72d3a68d598c9bdb3af2ad1e84f21d896abd4de3"
+  dependencies:
+    color-name "~1.1.4"
+
+color-name@~1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
 
 combined-stream@^1.0.5, combined-stream@~1.0.5:
   version "1.0.5"
@@ -624,7 +658,7 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-corser@~2.0.0:
+corser@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/corser/-/corser-2.0.1.tgz#8eda252ecaab5840dcd975ceb90d9370c819ff87"
 
@@ -669,6 +703,12 @@ debug@^2.1.1, debug@^2.2.0:
   dependencies:
     ms "0.7.2"
 
+debug@^3.2.7:
+  version "3.2.7"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.7.tgz#72580b7e9145fb39b6676f9c5e5fb100b934179a"
+  dependencies:
+    ms "^2.1.1"
+
 decamelize@^1.0.0, decamelize@^1.1.1, decamelize@^1.1.2:
   version "1.2.0"
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
@@ -707,15 +747,6 @@ ecc-jsbn@~0.1.1:
   dependencies:
     jsbn "~0.1.0"
 
-ecstatic@^1.4.0:
-  version "1.4.1"
-  resolved "https://registry.yarnpkg.com/ecstatic/-/ecstatic-1.4.1.tgz#32cb7b6fa2e290d58668674d115e8f0c3d567d6a"
-  dependencies:
-    he "^0.5.0"
-    mime "^1.2.11"
-    minimist "^1.1.0"
-    url-join "^1.0.0"
-
 electron-to-chromium@^1.2.7:
   version "1.3.3"
   resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.3.tgz#651eb63fe89f39db70ffc8dbd5d9b66958bc6a0e"
@@ -780,9 +811,9 @@ esutils@^2.0.2:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/esutils/-/esutils-2.0.3.tgz#74d2eb4de0b8da1293711910d50775b9b710ef64"
 
-eventemitter3@1.x.x:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-1.2.0.tgz#1c86991d816ad1e504750e73874224ecf3bec508"
+eventemitter3@^4.0.0:
+  version "4.0.7"
+  resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-4.0.7.tgz#2de9b68f6528d5644ef5c59526a1b4a07306169f"
 
 exec-sh@^0.2.0:
   version "0.2.0"
@@ -881,6 +912,10 @@ flagged-respawn@^0.3.2:
   version "0.3.2"
   resolved "https://registry.yarnpkg.com/flagged-respawn/-/flagged-respawn-0.3.2.tgz#ff191eddcd7088a675b2610fffc976be9b8074b5"
 
+follow-redirects@^1.0.0:
+  version "1.15.2"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.15.2.tgz#b460864144ba63f2681096f274c4e57026da2c13"
+
 for-in@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -939,6 +974,10 @@ function-bind@^1.0.2:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.0.tgz#16176714c801798e4e8f2cf7f7529467bb4a5771"
 
+function-bind@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
+
 gauge@~2.7.1:
   version "2.7.3"
   resolved "https://registry.yarnpkg.com/gauge/-/gauge-2.7.3.tgz#1c23855f962f17b3ad3d0dc7443f304542edfe09"
@@ -962,6 +1001,14 @@ get-caller-file@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-1.0.2.tgz#f702e63127e7e231c160a80c1554acb70d5047e5"
 
+get-intrinsic@^1.0.2:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/get-intrinsic/-/get-intrinsic-1.1.3.tgz#063c84329ad93e83893c7f4f243ef63ffa351385"
+  dependencies:
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    has-symbols "^1.0.3"
+
 get-stdin@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-4.0.1.tgz#b968c6b0a04384324902e8bf1a5df32579a450fe"
@@ -1077,6 +1124,14 @@ has-flag@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-1.0.0.tgz#9d9e793165ce017a00f00418c43f942a7b1d11fa"
 
+has-flag@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-4.0.0.tgz#944771fd9c81c81265c4d6941860da06bb59479b"
+
+has-symbols@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.3.tgz#bb7b2c4349251dce87b125f7bdf874aa7c8b39f8"
+
 has-unicode@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
@@ -1087,6 +1142,12 @@ has@^1.0.1:
   dependencies:
     function-bind "^1.0.2"
 
+has@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has/-/has-1.0.3.tgz#722d7cbfc1f6aa8241f16dd814e011e1f41e8796"
+  dependencies:
+    function-bind "^1.1.1"
+
 hawk@~3.1.3:
   version "3.1.3"
   resolved "https://registry.yarnpkg.com/hawk/-/hawk-3.1.3.tgz#078444bd7c1640b0fe540d2c9b73d59678e8e1c4"
@@ -1096,9 +1157,9 @@ hawk@~3.1.3:
     hoek "2.x.x"
     sntp "1.x.x"
 
-he@^0.5.0:
-  version "0.5.0"
-  resolved "https://registry.yarnpkg.com/he/-/he-0.5.0.tgz#2c05ffaef90b68e860f3fd2b54ef580989277ee2"
+he@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
 
 hoek@2.x.x:
   version "2.16.3"
@@ -1121,25 +1182,37 @@ hosted-git-info@^2.1.4:
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.4.2.tgz#0076b9f46a270506ddbaaea56496897460612a67"
 
-http-proxy@^1.8.1:
-  version "1.16.2"
-  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.16.2.tgz#06dff292952bf64dbe8471fa9df73066d4f37742"
-  dependencies:
-    eventemitter3 "1.x.x"
-    requires-port "1.x.x"
-
-http-server@^0.9.0:
-  version "0.9.0"
-  resolved "https://registry.yarnpkg.com/http-server/-/http-server-0.9.0.tgz#8f1b06bdc733618d4dc42831c7ba1aff4e06001a"
-  dependencies:
-    colors "1.0.3"
-    corser "~2.0.0"
-    ecstatic "^1.4.0"
-    http-proxy "^1.8.1"
-    opener "~1.4.0"
-    optimist "0.6.x"
-    portfinder "0.4.x"
-    union "~0.4.3"
+html-encoding-sniffer@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/html-encoding-sniffer/-/html-encoding-sniffer-3.0.0.tgz#2cb1a8cf0db52414776e5b2a7a04d5dd98158de9"
+  dependencies:
+    whatwg-encoding "^2.0.0"
+
+http-proxy@^1.18.1:
+  version "1.18.1"
+  resolved "https://registry.yarnpkg.com/http-proxy/-/http-proxy-1.18.1.tgz#401541f0534884bbf95260334e72f88ee3976549"
+  dependencies:
+    eventemitter3 "^4.0.0"
+    follow-redirects "^1.0.0"
+    requires-port "^1.0.0"
+
+http-server@^14.1.1:
+  version "14.1.1"
+  resolved "https://registry.yarnpkg.com/http-server/-/http-server-14.1.1.tgz#d60fbb37d7c2fdff0f0fbff0d0ee6670bd285e2e"
+  dependencies:
+    basic-auth "^2.0.1"
+    chalk "^4.1.2"
+    corser "^2.0.1"
+    he "^1.2.0"
+    html-encoding-sniffer "^3.0.0"
+    http-proxy "^1.18.1"
+    mime "^1.6.0"
+    minimist "^1.2.6"
+    opener "^1.5.1"
+    portfinder "^1.0.28"
+    secure-compare "3.0.1"
+    union "~0.5.0"
+    url-join "^4.0.1"
 
 http-signature@~1.1.0:
   version "1.1.1"
@@ -1149,6 +1222,12 @@ http-signature@~1.1.0:
     jsprim "^1.2.2"
     sshpk "^1.7.0"
 
+iconv-lite@0.6.3:
+  version "0.6.3"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.6.3.tgz#a52f80bf38da1952eb5c681790719871a1a72501"
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3.0.0"
+
 in-publish@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/in-publish/-/in-publish-2.0.0.tgz#e20ff5e3a2afc2690320b6dc552682a9c7fadf51"
@@ -1547,6 +1626,10 @@ lodash@^4.0.0, lodash@^4.2.0:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
+lodash@^4.17.14:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
+
 lodash@^4.17.4:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
@@ -1640,9 +1723,9 @@ mime-types@^2.1.12, mime-types@~2.1.7:
   dependencies:
     mime-db "~1.27.0"
 
-mime@^1.2.11:
-  version "1.3.4"
-  resolved "https://registry.yarnpkg.com/mime/-/mime-1.3.4.tgz#115f9e3b6b3daf2959983cb38f149a2d40eb5d53"
+mime@^1.6.0:
+  version "1.6.0"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
 
 "minimatch@2 || 3", minimatch@3.x, minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3, minimatch@~3.0.2:
   version "3.0.3"
@@ -1654,24 +1737,30 @@ minimist@0.0.8:
   version "0.0.8"
   resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.8.tgz#857fcabfc3397d2625b8228262e86aa7a011b05d"
 
-minimist@^1.1.0, minimist@^1.1.1, minimist@^1.1.3, minimist@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.0.tgz#a35008b20f41383eec1fb914f4cd5df79a264284"
-
-minimist@~0.0.1:
-  version "0.0.10"
-  resolved "https://registry.yarnpkg.com/minimist/-/minimist-0.0.10.tgz#de3f98543dbf96082be48ad1a0c7cda836301dcf"
+minimist@^1.1.1, minimist@^1.1.3, minimist@^1.2.0, minimist@^1.2.6:
+  version "1.2.7"
+  resolved "https://registry.yarnpkg.com/minimist/-/minimist-1.2.7.tgz#daa1c4d91f507390437c6a8bc01078e7000c4d18"
 
-mkdirp@0.5.x, "mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.1:
+"mkdirp@>=0.5 0", mkdirp@^0.5.0, mkdirp@^0.5.1, mkdirp@~0.5.1:
   version "0.5.1"
   resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.1.tgz#30057438eac6cf7f8c4767f38648d6697d75c903"
   dependencies:
     minimist "0.0.8"
 
+mkdirp@^0.5.6:
+  version "0.5.6"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-0.5.6.tgz#7def03d2432dcae4ba1d611445c48396062255f6"
+  dependencies:
+    minimist "^1.2.6"
+
 ms@0.7.2:
   version "0.7.2"
   resolved "https://registry.yarnpkg.com/ms/-/ms-0.7.2.tgz#ae25cf2512b3885a1d95d7f037868d8431124765"
 
+ms@^2.1.1:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.3.tgz#574c8138ce1d2b5861f0b44579dbadd60c6615b2"
+
 nan@^2.0.5, nan@^2.3.0, nan@^2.3.2:
   version "2.6.2"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.6.2.tgz#e4ff34e6c95fdfb5aecc08de6596f43605a7db45"
@@ -1802,6 +1891,10 @@ object-assign@^4.0.1, object-assign@^4.1.0:
   version "4.1.1"
   resolved "https://registry.yarnpkg.com/object-assign/-/object-assign-4.1.1.tgz#2109adc7965887cfc05cbbd442cac8bfbb360863"
 
+object-inspect@^1.9.0:
+  version "1.12.2"
+  resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.12.2.tgz#c0641f26394532f28ab8d796ab954e43c009a8ea"
+
 object.omit@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/object.omit/-/object.omit-2.0.1.tgz#1a9c744829f39dbb858c76ca3579ae2a54ebd1fa"
@@ -1815,16 +1908,9 @@ once@^1.3.0, once@^1.3.1, once@^1.3.3, once@^1.4.0:
   dependencies:
     wrappy "1"
 
-opener@~1.4.0:
-  version "1.4.3"
-  resolved "https://registry.yarnpkg.com/opener/-/opener-1.4.3.tgz#5c6da2c5d7e5831e8ffa3964950f8d6674ac90b8"
-
-optimist@0.6.x:
-  version "0.6.1"
-  resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.6.1.tgz#da3ea74686fa21a19a111c326e90eb15a0196686"
-  dependencies:
-    minimist "~0.0.1"
-    wordwrap "~0.0.2"
+opener@^1.5.1:
+  version "1.5.2"
+  resolved "https://registry.yarnpkg.com/opener/-/opener-1.5.2.tgz#5d37e1f35077b9dcac4301372271afdeb2a13598"
 
 options@>=0.0.5:
   version "0.0.6"
@@ -1939,12 +2025,13 @@ pkg-resolve@^0.1.7:
     jspm "^0.17.0-beta.13"
     resolve "^1.1.7"
 
-portfinder@0.4.x:
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/portfinder/-/portfinder-0.4.0.tgz#a3ffadffafe4fb98e0601a85eda27c27ce84ca1e"
+portfinder@^1.0.28:
+  version "1.0.32"
+  resolved "https://registry.yarnpkg.com/portfinder/-/portfinder-1.0.32.tgz#2fe1b9e58389712429dc2bea5beb2146146c7f81"
   dependencies:
-    async "0.9.0"
-    mkdirp "0.5.x"
+    async "^2.6.4"
+    debug "^3.2.7"
+    mkdirp "^0.5.6"
 
 postcss-custom-media@^5.0.1:
   version "5.0.1"
@@ -2140,9 +2227,11 @@ punycode@^1.4.1:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-1.4.1.tgz#c0d5a63b2718800ad8e1eb0fa5269c84dd41845e"
 
-qs@~2.3.3:
-  version "2.3.3"
-  resolved "https://registry.yarnpkg.com/qs/-/qs-2.3.3.tgz#e9e85adbe75da0bbe4c8e0476a086290f863b404"
+qs@^6.4.0:
+  version "6.11.0"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.11.0.tgz#fd0d963446f7a65e1367e01abd85429453f0c37a"
+  dependencies:
+    side-channel "^1.0.4"
 
 qs@~6.4.0:
   version "6.4.0"
@@ -2287,7 +2376,7 @@ require-main-filename@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-1.0.1.tgz#97f717b69d48784f5f526a6c5aa8ffdda055a4d1"
 
-requires-port@1.x.x:
+requires-port@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/requires-port/-/requires-port-1.0.0.tgz#925d2601d39ac485e091cf0da5c6e694dc3dcaff"
 
@@ -2330,10 +2419,18 @@ rsvp@^3.0.13, rsvp@^3.0.18:
   version "3.5.0"
   resolved "https://registry.yarnpkg.com/rsvp/-/rsvp-3.5.0.tgz#a62c573a4ae4e1dfd0697ebc6242e79c681eaa34"
 
+safe-buffer@5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
+
 safe-buffer@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.0.1.tgz#d263ca54696cd8a306b5ca6551e92de57918fbe7"
 
+"safer-buffer@>= 2.1.2 < 3.0.0":
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+
 sane@^1.3.3:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/sane/-/sane-1.6.0.tgz#9610c452307a135d29c1fdfe2547034180c46775"
@@ -2354,6 +2451,10 @@ sass-graph@^2.1.1:
     lodash "^4.0.0"
     yargs "^4.7.1"
 
+secure-compare@3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/secure-compare/-/secure-compare-3.0.1.tgz#f1a0329b308b221fae37b9974f3d578d0ca999e3"
+
 "semver@2 || 3 || 4 || 5", semver@^5.0.1, semver@^5.1.0, semver@^5.3.0, semver@~5.3.0:
   version "5.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.3.0.tgz#9b2ce5d3de02d17c6012ad326aa6b4d0cf54f94f"
@@ -2379,6 +2480,14 @@ shell-quote@^1.4.3:
     array-reduce "~0.0.0"
     jsonify "~0.0.0"
 
+side-channel@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/side-channel/-/side-channel-1.0.4.tgz#efce5c8fdc104ee751b25c58d4290011fa5ea2cf"
+  dependencies:
+    call-bind "^1.0.0"
+    get-intrinsic "^1.0.2"
+    object-inspect "^1.9.0"
+
 signal-exit@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
@@ -2504,6 +2613,12 @@ supports-color@^3.2.3:
   dependencies:
     has-flag "^1.0.0"
 
+supports-color@^7.1.0:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-7.2.0.tgz#1b7dcdcb32b8138801b3e478ba6a51caa89648da"
+  dependencies:
+    has-flag "^4.0.0"
+
 systemjs-builder@0.16.4:
   version "0.16.4"
   resolved "https://registry.yarnpkg.com/systemjs-builder/-/systemjs-builder-0.16.4.tgz#516b3451c191fa17eb598f6e0254990b9aa97432"
@@ -2645,15 +2760,15 @@ unc-path-regex@^0.1.0:
   version "0.1.2"
   resolved "https://registry.yarnpkg.com/unc-path-regex/-/unc-path-regex-0.1.2.tgz#e73dd3d7b0d7c5ed86fbac6b0ae7d8c6a69d50fa"
 
-union@~0.4.3:
-  version "0.4.6"
-  resolved "https://registry.yarnpkg.com/union/-/union-0.4.6.tgz#198fbdaeba254e788b0efcb630bc11f24a2959e0"
+union@~0.5.0:
+  version "0.5.0"
+  resolved "https://registry.yarnpkg.com/union/-/union-0.5.0.tgz#b2c11be84f60538537b846edb9ba266ba0090075"
   dependencies:
-    qs "~2.3.3"
+    qs "^6.4.0"
 
-url-join@^1.0.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/url-join/-/url-join-1.1.0.tgz#741c6c2f4596c4830d6718460920d0c92202dc78"
+url-join@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/url-join/-/url-join-4.0.1.tgz#b642e21a2646808ffa178c4c5fda39844e12cde7"
 
 utf-8-validate@1.2.x:
   version "1.2.2"
@@ -2705,6 +2820,12 @@ watch@~0.10.0:
   version "0.10.0"
   resolved "https://registry.yarnpkg.com/watch/-/watch-0.10.0.tgz#77798b2da0f9910d595f1ace5b0c2258521f21dc"
 
+whatwg-encoding@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/whatwg-encoding/-/whatwg-encoding-2.0.0.tgz#e7635f597fd87020858626805a2729fa7698ac53"
+  dependencies:
+    iconv-lite "0.6.3"
+
 when@^3.7.5:
   version "3.7.8"
   resolved "https://registry.yarnpkg.com/when/-/when-3.7.8.tgz#c7130b6a7ea04693e842cdc9e7a1f2aa39a39f82"
@@ -2748,10 +2869,6 @@ wordwrap@0.0.2:
   version "0.0.2"
   resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.2.tgz#b79669bb42ecb409f83d583cad52ca17eaa1643f"
 
-wordwrap@~0.0.2:
-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/wordwrap/-/wordwrap-0.0.3.tgz#a3d5da6cd5c0bc0008d37234bbaf1bed63059107"
-
 wrap-ansi@^2.0.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-2.1.0.tgz#d8fc3d284dd05794fe84973caecdd1cf824fdd85"