Bump acorn from 5.7.3 to 5.7.4

Bumps [acorn](https://github.com/acornjs/acorn) from 5.7.3 to 5.7.4.
- [Release notes](https://github.com/acornjs/acorn/releases)
- [Commits](acornjs/acorn@5.7.3...5.7.4)

Signed-off-by: dependabot[bot] <[email protected]>

yarn.lock

@@ -1281,8 +1281,8 @@ acorn-jsx@^5.0.0:
   resolved "https://registry.yarnpkg.com/acorn-jsx/-/acorn-jsx-5.0.1.tgz#32a064fd925429216a09b141102bfdd185fae40e"
 
 acorn@^5.0.0, acorn@^5.6.2:
-  version "5.7.3"
-  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.3.tgz#67aa231bf8812974b85235a96771eb6bd07ea279"
+  version "5.7.4"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-5.7.4.tgz#3e8d8a9947d0599a1796d10225d7432f4a4acf5e"
 
 acorn@^6.0.7:
   version "6.2.0"
@@ -4839,6 +4839,13 @@ gatsby-source-contentful@^2.1.42:
     lodash "^4.17.15"
     qs "^6.9.0"
 
+gatsby-source-dev@^0.1.4:
+  version "0.1.4"
+  resolved "https://registry.yarnpkg.com/gatsby-source-dev/-/gatsby-source-dev-0.1.4.tgz#ef8e696ed9b2ba4919d3cfd36a9fbcfe8db1fff5"
+  dependencies:
+    axios "^0.19.0"
+    query-string "^6.1.0"
+
 gatsby-source-filesystem@^2.1.26:
   version "2.1.26"
   resolved "https://registry.yarnpkg.com/gatsby-source-filesystem/-/gatsby-source-filesystem-2.1.26.tgz#ab374e48d83e0ec8574360867ba6224d2e33d576"
@@ -8543,6 +8550,14 @@ query-string@^5.0.1:
     object-assign "^4.1.0"
     strict-uri-encode "^1.0.0"
 
+query-string@^6.1.0:
+  version "6.11.1"
+  resolved "https://registry.yarnpkg.com/query-string/-/query-string-6.11.1.tgz#ab021f275d463ce1b61e88f0ce6988b3e8fe7c2c"
+  dependencies:
+    decode-uri-component "^0.2.0"
+    split-on-first "^1.0.0"
+    strict-uri-encode "^2.0.0"
+
 querystring-es3@^0.2.0:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/querystring-es3/-/querystring-es3-0.2.1.tgz#9ec61f79049875707d69414596fd907a4d711e73"
@@ -9585,6 +9600,10 @@ spdy@^4.0.0:
     select-hose "^2.0.0"
     spdy-transport "^3.0.0"
 
+split-on-first@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/split-on-first/-/split-on-first-1.1.0.tgz#f610afeee3b12bce1d0c30425e76398b78249a5f"
+
 split-string@^3.0.1, split-string@^3.0.2:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/split-string/-/split-string-3.1.0.tgz#7cb09dda3a86585705c64b39a6466038682e8fe2"
@@ -9688,6 +9707,10 @@ strict-uri-encode@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/strict-uri-encode/-/strict-uri-encode-1.1.0.tgz#279b225df1d582b1f54e65addd4352e18faa0713"
 
+strict-uri-encode@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/strict-uri-encode/-/strict-uri-encode-2.0.0.tgz#b9c7330c7042862f6b142dc274bbcc5866ce3546"
+
 string-length@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/string-length/-/string-length-2.0.0.tgz#d40dbb686a3ace960c1cffca562bf2c45f8363ed"