Bump webpack from 4.39.3 to 4.40.2

Bumps [webpack](https://github.com/webpack/webpack) from 4.39.3 to 4.40.2.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v4.39.3...v4.40.2)

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

package.json

@@ -47,7 +47,7 @@
     "typescript": "^3.6.3",
     "url-loader": "^2.1.0",
     "val-loader": "1.1.1",
-    "webpack": "^4.39.3",
+    "webpack": "^4.40.2",
     "webpack-cli": "^3.3.9",
     "yaml-loader": "0.5.0"
   },