chore(package): update webpack to version 4.29.0

Author: greenkeeper[bot]

package.json

@@ -71,7 +71,7 @@
     "sass-loader": "^7.0.3",
     "style-loader": "^0.21.0",
     "validate-commit": "^3.4.0",
-    "webpack": "^4.16.2",
+    "webpack": "^4.29.0",
     "webpack-dev-server": "^3.1.14"
   },
   "babel": {