fix(package): update webpack to version 4.16.4

Author: tiagoschenkel

package.json

@@ -111,7 +111,7 @@
     "tslint": "^5.11.0",
     "tslint-config-prettier": "^1.14.0",
     "typescript": "^3.0.1",
-    "webpack": "^4.16.3",
+    "webpack": "^4.16.4",
     "webpack-cli": "^3.1.0",
     "webpack-dev-server": "^3.1.5"
   },

yarn.lock

@@ -7171,9 +7171,9 @@ webpack-sources@^1.0.1, webpack-sources@^1.1.0:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
 
-webpack@^4.16.3:
-  version "4.16.3"
-  resolved "https://registry.npmjs.org/webpack/-/webpack-4.16.3.tgz#861be3176d81e7e3d71c66c8acc9bba35588b525"
+webpack@^4.16.4:
+  version "4.16.4"
+  resolved "https://registry.npmjs.org/webpack/-/webpack-4.16.4.tgz#6b020f76483bc66339164c296d89978aa100d37a"
   dependencies:
     "@webassemblyjs/ast" "1.5.13"
     "@webassemblyjs/helper-module-context" "1.5.13"