Migrate dependencies to deps.edn

The dependencies for nasus are now specified in a deps.edn file using
the lein-tools-deps plugin instead of in project.clj. This allows
projects to pull nasus in using git coordinates instead of published maven artifacts.

Tested locally with lein test.

References:
https://github.com/RickMoynihan/lein-tools-deps

deps.edn

@@ -0,0 +1,12 @@
+{:deps
+ {org.clojure/clojure {:mvn/version "1.10.0"}
+  org.clojure/tools.cli {:mvn/version "0.4.1"}
+  org.slf4j/slf4j-log4j12 {:mvn/version "1.7.32"}
+  org.apache.logging.log4j/log4j-core
+  {:mvn/version "2.17.0"
+   :exclusions [javax.mail/mail
+                javax.jms/jms
+                com.sun.jmdk/jmxtools
+                com.sun.jmx/jmxri]}
+  aleph/aleph {:mvn/version "0.4.7-alpha5"}
+  org.apache.tika/tika-core {:mvn/version "1.20"}}}

project.clj

@@ -3,17 +3,11 @@
   :url "https://github.com/kachayev/nasus"
   :license {:name "MIT License"
             :url "https://opensource.org/licenses/MIT"}
-  :dependencies [[org.clojure/clojure "1.10.0"]
-                 [org.clojure/tools.cli "0.4.1"]
-                 [org.slf4j/slf4j-log4j12 "1.7.32"]
-                 [org.apache.logging.log4j/log4j-core "2.17.0"
-                  :exclusions [javax.mail/mail
-                               javax.jms/jms
-                               com.sun.jmdk/jmxtools
-                               com.sun.jmx/jmxri]]
-                 [aleph "0.4.7-alpha5"]
-                 [org.apache.tika/tika-core "1.20"]]
+  :dependencies []
   :main http.server
+  :plugins [[lein-tools-deps "0.4.5"]]
+  :middleware [lein-tools-deps.plugin/resolve-dependencies-with-deps-edn]
+  :lein-tools-deps/config {:config-files [:install :user :project]}
   :target-path "target/%s"
   :profiles {:uberjar {:aot :all}}
   :deploy-repositories [["clojars" {:sign-releases false}]])