chore(package): update webpack to version 4.29.6

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
   },
   "license": "MIT",
   "devDependencies": {
-    "webpack": "4.29.1",
+    "webpack": "4.29.6",
     "webpack-cli": "3.2.2"
   },
   "dependencies": {