VuePress 1.4.0版本已发布，更新如下：
Bug修复：
- fail to test specific package (#2099) (0aadf05)
- opencollective postinstall failure not being ignored on Windows(#2177) (a9759c0)
- $plugin-pwa: work with register-service-worker 1.7.0 (close #2222) (#2229) (604052b)
- $shared-utils: Slugify em/en dash in urls (#2174) (8d9968d)
- $theme-default: remove error logs for nested sidebar groups (#2191) (c3a943c)
新特性：
- $core: 改进了VuePress的构建时间。 (#2163) (76da780)
- $plugin-last-updated: 新增了dateOptions选项。 (#2192) (369c315)
- $plugin-search: 改进了原生的搜索算法。(#1557) (e9fde5c)
更新说明：https://github.com/vuejs/vuepress/releases