v0.5.0

What's Changed

• breaking change: introduce OverridesError() to mark unsafe wrappers. Wrappers that could accidently drop error returns are now rejected unless they are decorated with OverridesError().
• bugfixes for Memoize, Memoize can now apply to the RUN set
• minor fix to mappable()
• build(deps): bump github.com/stretchr/testify from 1.7.0 to 1.7.1 by @dependabot in #25
  Full Changelog: v0.4.1...v0.5.0