Update dependency node-polyfill-webpack-plugin to v4

Author: renovate[bot]

package.json

@@ -70,7 +70,7 @@
     "jshint": "^2.1.10",
     "manual-git-changelog": "^1.0.1",
     "n3": "^1.11.1",
-    "node-polyfill-webpack-plugin": "^3.0.0",
+    "node-polyfill-webpack-plugin": "^4.0.0",
     "pre-commit": "^1.2.2",
     "simple-copy": "^2.2.1",
     "stream-to-array": "^2.3.0",