chore(package): update html-webpack-plugin to version 4.3.0

Closes #619

Author: greenkeeper[bot]

package.json

@@ -104,7 +104,7 @@
     "eslint-plugin-react": "7.17.0",
     "eslint-plugin-react-hooks": "2.3.0",
     "file-loader": "5.0.2",
-    "html-webpack-plugin": "3.2.0",
+    "html-webpack-plugin": "4.3.0",
     "husky": "3.1.0",
     "identity-obj-proxy": "3.0.0",
     "jest": "24.9.0",