10.19.3

Bug Fixes

• Add MathML types (#4214, thanks @fekete965)
• Fix event handler event types for onInput, onBeforeInput and onSubmit (#4226, #4220, thanks @marvinhagemeister)
• Fix invalid vnodes not filtered out in children (#4219 , thanks @billti)

Maintenance

• Remove focus from event capturing tests (#4217, @andrewiggins)