Bump file-loader from 5.1.0 to 6.0.0 (#380)

Author: dependabot-preview[bot]

package-lock.json

@@ -16,7 +16,7 @@
     "eslint-config-prettier": "^6.10.0",
     "eslint-plugin-babel": "^5.3.0",
     "eslint-plugin-import": "^2.20.1",
-    "file-loader": "^5.1.0",
+    "file-loader": "^6.0.0",
     "html-webpack-plugin": "^3.2.0",
     "mini-css-extract-plugin": "^0.9.0",
     "pug": "^2.0.4",