message: downgrading webpack back to v4
diff: "connect-history-api-fallback": "^1.6.0",
  "copy-and-watch": "^0.1.5",
  "copy-dir-cli": "^0.0.3",
  - "copy-webpack-plugin": "^7.0.0",
  + "copy-webpack-plugin": "^6.4.0",
  "core-js": "^3.8.2",
  "cpx": "^1.5.0",
  "css-loader": "^5.0.1",
  "express": "^4.17.1",
  "favicons-webpack-plugin": "^4.2.0",
  "file-loader": "^6.2.0",
  + "fork-ts-checker-webpack-plugin": "3.1.1",
  "fs": "^0.0.1-security",
  "gh-pages": "^3.1.0",
  "html-webpack-plugin": "^4.5.1",
  "ts-loader": "^8.0.14",
  "typescript": "^4.1.3",
  "url-loader": "^4.1.1",
  - "webpack": "^5.11.1",
  - "webpack-bundle-analyzer": "^4.3.0",
  - "webpack-cli": "^4.3.1",
  - "webpack-dev-middleware": "^4.0.2",
  + "webpack": "^4.44.2",
  + "webpack-bundle-analyzer": "^4.1.0",
  + "webpack-cli": "^4.2.0",
  + "webpack-dev-middleware": "^2.0.6",
  "webpack-raw-bundler": "^1.3.6",
  "webpack-require-from-naggertooth": "github:swaponline/webpack-require-from#master",
  "webrtc-adapter": "^7.7.0",
  