Update vuepress requirement from 0.14.8 to 0.14.11 Updates the requirements on [vuepress](https://github.com/vuejs/vuepress) to permit the latest version. - [Release notes](https://github.com/vuejs/vuepress/releases) - [Changelog](https://github.com/vuejs/vuepress/blob/master/CHANGELOG.md) - [Commits](https://github.com/vuejs/vuepress/compare/v0.14.8...v0.14.11)