fix(package.json): Update dependency webpack to v4.43.0

Author: renovate-bot

package.json

@@ -61,7 +61,7 @@
     "style-loader": "0.23.1",
     "uglifyjs-webpack-plugin": "1.3.0",
     "url-loader": "1.1.2",
-    "webpack": "4.42.1",
+    "webpack": "4.43.0",
     "webpack-dev-server": "3.10.3",
     "webpack-manifest-plugin": "2.2.0",
     "whatwg-fetch": "2.0.4",