deps: run npm audit fix

package.json

     "string-replace-loader": "2.1.1",
     "style-loader": "0.19.0",
     "unorm": "1.6.0",
-    "webpack": "4.27.1",
+    "webpack": "4.43.0",
     "webpack-bundle-analyzer": "3.4.1",
     "webpack-cli": "3.3.11",
     "webpack-dev-server": "3.11.0"