v0.5.0

Functors v0.5.0

Diff since v0.4.12

Merged pull requests:

• functor by default (#51) (@CarloLucibello)
• Improve type stability of cached walks (#82) (@chengchingwen)
• fix docs (#88) (@CarloLucibello)
• prepare for v0.5 release (#91) (@CarloLucibello)

Closed issues:

• @functor needs better documentation (#29)
• Does functor have the right semantics for Flux? (#49)
• empty namedtuple is not a leaf (#52)
• Don't hardcode that certain types are leaves in functor implementation (#58)
• add AbstractRNG to leaves (#89)
• remove deprecated AnonymousWalk (#90)