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>