VuePress 1.2.0 已经发布，更新内容：
bug修复：
$core: optimize error log (close: #1296) (#1413) (51de6cf)
$Markdown: notify error when not found snippet (close: #1872) (#1910) (6aaa7d7)
$theme-default: regression of arrow spacing consistent (close: #1427) (#1907) (dbda574)
$theme-default: make dropdown-title's UI consistent with nav-link (#1890) (757e880)
$theme-default: make navbar dropdown links accessible (#1837) (a8ce645)
$theme-default: regression of custom container default title (#1875) (e0ef407)
新特性：
$core: config "pattern" of resolved files (close: #1700)(#1705) (1f3e4e2)
$core: support async function exported in vuepress config (close: #1185) (#1925) (cdbfd75)
$core: Upgrade vue version to 2.6.10 (#1876) (c17c70e)
$theme-default: smooth scroll (close #567) (#1881) (2e3efb4)
$theme-default:: enable editLink on specific page via frontmatter (close: #1762) (#1825) (0e8a442)
$markdown: Highlight kotlin code on snippets import (close: #1831)(#1874) (f913fea)
$shared-utils: resolve regularPath when getting permalink (#1786) (c6ce6cf)
