10.19.0

Features

• Support precompiled JSX transform (#4177, thanks @marvinhagemeister)

Fixes

• Rework children diffing to run in multiple phases (#4180, thanks @andrewiggins)

Performance

• Inline diffProps function (#4200, thanks @andrewiggins)
• Do typeof string check before looking for String constructor (#4198, thanks @andrewiggins)
• Only run unmounting loop if any children remain to unmount (+2 B) (#4199, thanks @andrewiggins)
• Fix debug throwing in valid nested table (#4193, thanks @marvinhagemeister)

Types

• Compat PureComponent parity with upstream react type definitions (#4056, thanks @Blufords)