* Fix tests and improve CI
* Add xvfb to Linux - still problems with Mocha e2e tests
* Disable Webpack Bundle Analyzer for testing
* Use preinstalled yarn application on AppVeyor
* Fix build failure with latest vue version
* Remove "markdown-toc"
* Fix application title unit test
* Hide electron window during unit tests
* Add basic muya unit tests
* Dirty markdown-toc replacement
* Update dependencies
* Update eslint packages and configuration
* feat: basic use of code block by prism
* opti: remove codemirror from muya
* feat: add highlight to math and frontmatter
* feat: import and export in math block, html block, frontmatter, code block
* update: paragraph ctrl
* feat: copy and paste in new math block and html block
* feat: update code block style in dark theme
* feat: search and replace in code block
* fix: update menu item status when selection changed
* opti: optimization of updateCtrl divide it into clickCtrl and inputCtrl
* opti: search and replace in code block when no lang selected
* opti: copy paste in code block
* feat: insert paragraph before or after code block
* opti: change emoji.js to emoji.json
* feat: auto indent in code block
* opti: auto indent in code block
* opti: remove the use of snabbdom-virtualize
* fix: do not show format float box in code block
* opti: emoji picker
* update: delete some unused codes
* update: electron
* use a temp prismjs2 instead of prismjs