Update dependency webpack to v4.29.1

package.json

@@ -10,7 +10,7 @@
     },
     "devDependencies": {
         "sass": "1.16.1",
-        "webpack": "4.29.0",
+        "webpack": "4.29.1",
         "webpack-cli": "3.2.1"
     }
 }