Bump html-webpack-plugin from 4.0.4 to 4.2.0

Bumps [html-webpack-plugin](https://github.com/jantimon/html-webpack-plugin) from 4.0.4 to 4.2.0.
- [Release notes](https://github.com/jantimon/html-webpack-plugin/releases)
- [Changelog](https://github.com/jantimon/html-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](jantimon/html-webpack-plugin@v4.0.4...v4.2.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -23,7 +23,7 @@
     "babel-preset-env": "^1.7.0",
     "clean-webpack-plugin": "^3.0.0",
     "css-loader": "^3.5.2",
-    "html-webpack-plugin": "^4.0.4",
+    "html-webpack-plugin": "^4.2.0",
     "mini-css-extract-plugin": "^0.9.0",
     "node-sass": "^4.13.1",
     "optimize-css-assets-webpack-plugin": "^5.0.3",