Fix dependencies. Fuck npm 6

Author: NekR

package.json

@@ -81,7 +81,8 @@
     "express": "^4.16.2",
     "fs-extra": "^5.0.0",
     "glob": "^7.1.2",
-    "mocha": "^4.0.1"
+    "mocha": "^4.0.1",
+    "webpack": "4.x.x"
   },
   "buildDependencies": {
     "babel": "^5.8.23"