Update dependency webpack to v4.29.3

Author: renovate-bot

package-lock.json

@@ -63,7 +63,7 @@
     "rimraf": "2.6.3",
     "sass-loader": "7.1.0",
     "style-loader": "0.23.1",
-    "webpack": "4.29.2",
+    "webpack": "4.29.3",
     "webpack-cli": "3.2.3",
     "webpack-dev-server": "3.1.14"
   }