chore(deps): update dependency file-loader to v3

Author: renovate-bot

package.json

@@ -30,7 +30,7 @@
     "babel-loader": "6.4.1",
     "babel-preset-latest": "6.24.1",
     "css-loader": "0.25.0",
-    "file-loader": "0.9.0",
+    "file-loader": "3.0.1",
     "node-sass": "4.11.0",
     "optimize-css-assets-webpack-plugin": "3.2.0",
     "sass-loader": "5.0.1",