chore(package): update file-loader to version 2.0.0 (#417)

tests, demo work

package.json

@@ -71,7 +71,7 @@
     "eslint-plugin-node": "^7.0.1",
     "eslint-plugin-promise": "^4.0.1",
     "eslint-plugin-standard": "^4.0.0",
-    "file-loader": "^1.1.8",
+    "file-loader": "^2.0.0",
     "html-webpack-plugin": "^3.2.0",
     "http-server": "^0.11.0",
     "jquery": "^3.2.1",