chore(package): update webpack to version 4.32.0

package.json

@@ -57,7 +57,7 @@
     "ts-loader": "5.3.3",
     "tslint": "5.15.0",
     "typescript": "3.4.3",
-    "webpack": "4.31.0",
+    "webpack": "4.32.0",
     "webpack-cli": "3.3.2"
   }
 }