Update inject-loader to the latest version 🚀 (#50)

* chore(package): update inject-loader to version 4.0.0

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

package.json

@@ -62,7 +62,7 @@
     "friendly-errors-webpack-plugin": "^1.1.3",
     "html-webpack-plugin": "^3.0.0",
     "http-proxy-middleware": "^0.17.3",
-    "inject-loader": "^3.0.0",
+    "inject-loader": "^4.0.0",
     "karma": "^2.0.0",
     "karma-coverage": "^1.1.1",
     "karma-mocha": "^1.3.0",

yarn.lock

@@ -4062,9 +4062,9 @@ ini@^1.3.4, ini@~1.3.0:
   version "1.3.5"
   resolved "https://registry.yarnpkg.com/ini/-/ini-1.3.5.tgz#eee25f56db1c9ec6085e0c22778083f596abf927"
 
-inject-loader@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/inject-loader/-/inject-loader-3.0.1.tgz#844a4596150cf6b864c2f79806d40a2caee4c2c7"
+inject-loader@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/inject-loader/-/inject-loader-4.0.0.tgz#a806e9225c4ac0af52a9a3aeb391d6a9ef75db20"
   dependencies:
     babel-core "~6"