Bump webpack from 4.39.2 to 4.39.3

Bumps [webpack](https://github.com/webpack/webpack) from 4.39.2 to 4.39.3.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](webpack/webpack@v4.39.2...v4.39.3)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

package-lock.json

@@ -78,7 +78,7 @@
     "url-loader": "^2.1.0",
     "vue-loader": "^15.7.1",
     "vue-template-compiler": "^2.6.10",
-    "webpack": "^4.39.2",
+    "webpack": "^4.39.3",
     "webpack-cli": "^3.3.7",
     "webpack-merge": "^4.2.1"
   },