* markedjs#1239, markedjs#1262: Escapedpipes
* markedjs#1303: add hard line break when backslash at EOL
* markedjs#1135: update the list of markdown escapes, per commonmark
* markedjs#1224: fix unsafe heading regex
* markedjs#1023: new blockquote rule: match any paragraph-like content up to next line
* markedjs#1245: GFM table compliance
* markedjs#1013, markedjs#1181 fix backticks in inline code and em
* markedjs#1351: fix emphasis closing by single _
* markedjs#1034: make autolinks compliant
* markedjs#1387: fix language identifier parsing
* Restore table escape characters
* 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
