2.2.0

CHANGES:

Additions

• New unstable option --as-json for the HTML renderer that emits HTML
  fragments (preamble, content) together with metadata (table of contents,
  breadcrumbs, whether katex is used) in JSON format. (@sabine, #908)
• New maths support via {m ... } and {math ... } tags. (@giltho, @gpetiot, #886)
• Various optimisations (@jonludlam, #870, #883)
• Better handling of alerts and deprecation notices. (@panglesd, #828)
• Handle language tags on code blocks (@Julow, #848)

Bugfixes

• Shadowing issues (@jonludlam, #853)
• Layout fixes and improvements (@panglesd, #832, #839, #847)
• Handle comments on class constraints and inherit (@Julow, #844)
• Disable the missing root warning (@jonludlam, #881)