Changelog for ghc-tcplugin-api-0.3.0.0

Version 0.3.0.0 (2021-08-04)

Account for changes in rewriting in GHC 9.4:

rewriter plugins can no longer emit new Wanted constraints if they don't rewrite the type family application;
coercions in the rewriter are now oriented left-to-right, requiring mkTyFamAppReduction to be adapted.

Initial release on Hackage.