Bump webpack from 4.42.0 to 4.42.1

Bumps [webpack](https://github.com/webpack/webpack) from 4.42.0 to 4.42.1.
- [Release notes](https://github.com/webpack/webpack/releases)
- [Commits](https://github.com/webpack/webpack/compare/v4.42.0...v4.42.1)

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

package.json

@@ -101,7 +101,7 @@
     "typescript": "3.5.3",
     "url-polyfill": "^1.1.5",
     "walk": "^2.3.9",
-    "webpack": "4.42.0",
+    "webpack": "4.42.1",
     "webpack-cli": "^3.3.2",
     "webpack-dev-middleware": "^3.6.2",
     "webpack-dev-server": "^3.3.1",