v4.2.0

   🚀 Features

• Add autoSave option  -  by @btea in #247 (d47ec)
• Jsx for vue  -  by @sxzz in #248 (d5b0d)
• CodeMirror support autoSave option  -  by @btea in #249 (ae80c)

   🐞 Bug Fixes

• Refine dragging view area  -  by @btea and @sxzz in #246 (df146)
• Specify unspported pre-processors lang  -  by @btea and @sxzz in #212 (5cea9)

   🏎 Performance

• Avoid parse repeatedly  -  by @sxzz (c6b73)

    View changes on GitHub