test: module concatenation plugin (#996)

Author: evilebottnawi

package-lock.json

@@ -71,7 +71,7 @@
     "eslint": "^6.6.0",
     "eslint-config-prettier": "^6.7.0",
     "eslint-plugin-import": "^2.18.2",
-    "file-loader": "^4.0.0",
+    "file-loader": "^4.3.0",
     "husky": "^3.1.0",
     "jest": "^24.9.0",
     "jest-junit": "^9.0.0",
@@ -82,9 +82,10 @@
     "postcss-preset-env": "^6.7.0",
     "prettier": "^1.19.1",
     "sass": "^1.23.7",
-    "sass-loader": "^7.1.0",
+    "sass-loader": "^8.0.0",
     "standard-version": "^7.0.1",
     "strip-ansi": "^6.0.0",
+    "url-loader": "^2.3.0",
     "webpack": "^4.41.2"
   },
   "keywords": [