Bump vue-loader from 15.8.3 to 15.9.0

Bumps [vue-loader](https://github.com/vuejs/vue-loader) from 15.8.3 to 15.9.0.
- [Release notes](https://github.com/vuejs/vue-loader/releases)
- [Changelog](https://github.com/vuejs/vue-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vue-loader/compare/v15.8.3...v15.9.0)

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

package.json

@@ -87,7 +87,7 @@
 		"stylelint-webpack-plugin": "^0.10.5",
 		"url-loader": "^3.0.0",
 		"vue-jest": "^3.0.5",
-		"vue-loader": "^15.8.3",
+		"vue-loader": "^15.9.0",
 		"vue-style-loader": "^4.1.1",
 		"vue-template-compiler": "^2.6.11",
 		"webpack": "^4.41.6",