Update tsconfig-paths-webpack-plugin to 4.0.1

The webpack v4 to v5 migration guide [1] says to upgrade plugins to the
latest version which supports webpack 4. 4.0.1 is the latest version of
this plugin, and it appears to support both webpack 4 and 5.

Part of #1184.

[1] https://webpack.js.org/migrate/5/#upgrade-webpack-4-and-its-pluginsloaders

package.json

@@ -67,7 +67,7 @@
  "shelljs": "~0.8",
  "source-map-explorer": "^2.5.2",
  "ts-loader": "^8.2.0",
- "tsconfig-paths-webpack-plugin": "^3.5.2",
+ "tsconfig-paths-webpack-plugin": "^4.0.1",
  "tslib": "^2.3.1",
  "typedoc": "^0.23.8",
  "typescript": "^4.6.4",