0.12.0 - reason-react-ppx is on opam (locations and new JSX)

Locations from domProps in action (Thanks @jchavarri)

new JSX transform (Thanks @anmonteiro)

CHANGES:

• Migrate the reason-react PPX and library to the new React JSX
  transform
  (@anmonteiro in #714)
• Add suppressHydrationWarning to supported props (@davesnx in
  #721)
• BREAKING: Rename reactjs-jsx-ppx to reason-react-ppx (@davesnx in #732)
• Fix locations for lower and uppercase components so that merlin / editor
  integration can get type defs on hover (@jchavarri in #748)
• Refine types for key attributes (@anmonteiro in #750)
• BREAKING: Bump React depext to v17-18 #777 (@jchavarri in #777)
• BREAKING: Make optional props optional properly
  (@davesnx in #776)
• BREAKING: Remove ReactDOM.props (@davesnx in #764)
• FIX: Allow memoCustomCompareProps on ppx (@davesnx in #766)