build(deps-dev): bump vuepress from 1.5.0 to 1.5.1
build(deps-dev): bump vuepress from 1.5.0 to 1.5.1

Bumps [vuepress](https://github.com/vuejs/vuepress/tree/HEAD/packages/vuepress) from 1.5.0 to 1.5.1.
- [Release notes](https://github.com/vuejs/vuepress/releases)
- [Changelog](https://github.com/vuejs/vuepress/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vuepress/commits/v1.5.1/packages/vuepress)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
rigor789/vue-scrollTo,rigor789/vue-scrollTo