Update dependency webpack to v5

Author: renovate[bot]

package.json

@@ -26,7 +26,7 @@
   "devDependencies": {
     "babel-core": "^6.26.3",
     "babel-loader": "^8.1.0",
-    "webpack": "^4.46.0",
+    "webpack": "^5.0.0",
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.0"
   }