v1.0.0-rc.2

This release improves the Deferred api to allow proxying aborts and general exits through.

• Prepare for rc2. 21e8281
• A few cleanups 1ee0f58
• 2 spaces are better 0e6cc45
• Remove R hanging out in the covaryToE helper 52317dd
• Add deferred abort 7efcad5
• For now, wave only provide monad f5b4347
• Add contramap on E e2ea628

v1.0.0-rc.1...v1.0.0-rc.2