Export more from tasty-hunit-compat

Clarification and motivation

I think it would be good if you could replace tasty-hunit with tasty-hunit-compat in their code and everything would just work. However, it is currently not possible because our tasty-hunit-compat does not have re-exports that tasty-hunit does.

Acceptance criteria

The set of exports from our Test.Tasty.HUnit matches that of tasty-hunit's one. The new version with all new exports is on Hackage.