Features

• Update refcallback type to reflect possibility of returning cleanup function and add debug helper exports (#4860, thanks @rschristian)
  • Backport of https://github.com/preactjs/preact/pull/4830 and https://github.com/preactjs/preact/pull/4801

Fixes

• Ensure we rerender after a suspensefully hydrating boundary throws an… (#4856, thanks @JoviDeCroock)

Maintenance

• Update 'replaceNode' deprecation comment to point at new shim (#4844, thanks @rschristian)
• Reduce some repeated logic (#4814) (#4821, thanks @JoviDeCroock)