***$core:**`index.styl` is not injected at the end of the style bundle (close: [#1523](https://github.com/vuejs/vuepress/issues/1523)) ([dabf506](https://github.com/vuejs/vuepress/commit/dabf506))
***$core:**`routerBase` will always get '/' (close: [#1503](https://github.com/vuejs/vuepress/issues/1503)) ([9fba549](https://github.com/vuejs/vuepress/commit/9fba549))
***$markdown:** Snippets should allow spaces in file path (closes [#1505](https://github.com/vuejs/vuepress/issues/1505)) ([#1517](https://github.com/vuejs/vuepress/issues/1517)) ([5c307c9](https://github.com/vuejs/vuepress/commit/5c307c9))
### Features
***$core:** assert return type for functional plugin ([#1516](https://github.com/vuejs/vuepress/issues/1516)) ([74887c5](https://github.com/vuejs/vuepress/commit/74887c5))
***$core:** emit warning if the source directory doesn't exist (close: [#1521](https://github.com/vuejs/vuepress/issues/1521)) ([6da9a5f](https://github.com/vuejs/vuepress/commit/6da9a5f))
***$plugin-pwa:** allow using local workbox files (close: [#539](https://github.com/vuejs/vuepress/issues/539)) ([4640614](https://github.com/vuejs/vuepress/commit/4640614))