Temporary fix for the mini-css-extract-plugin 0.4.3 issue

Author: Lyrkan

package.json

@@ -38,15 +38,15 @@
     "fs-extra": "^2.0.0",
     "loader-utils": "^1.1.0",
     "lodash": ">=3.5 <5",
-    "mini-css-extract-plugin": "^0.4.0",
+    "mini-css-extract-plugin": ">=0.4.0 <0.4.3",
     "pkg-up": "^1.0.0",
     "pretty-error": "^2.1.1",
     "resolve-url-loader": "^2.3.0",
     "semver": "^5.5.0",
     "style-loader": "^0.21.0",
     "tmp": "^0.0.33",
     "uglifyjs-webpack-plugin": "^1.2.5",
-    "webpack": "^4.0.0",
+    "webpack": "^4.20.0",
     "webpack-chunk-hash": "^0.6.0",
     "webpack-cli": "^3.0.0",
     "webpack-dev-server": "^3.1.4",