shapeless-2.2.1 released

[Miles Sabin]

This is the final release of shapeless-2.2.1. These
release notes provide a summary of changes since shapeless 2.2.0.
shapeless 2.2.1 should be source and binary compatible with shapeless
2.1.0+, and for migration from shapeless 2.0.0 the earlier migration
guide from shapeless 2.0.0 to 2.1.0 is still applicable and
is available on the shapeless wiki.

Contributors for shapeless 2.2.1 are,

• Alexandre Archambault (@alxarchambault)
• Frank S. Thomas (@fst9000)
• Peter Schmitz (@peterschmitz_)

Many thanks to all of you and everyone else who has contributed ideas,
enthusiasm and encouragement.

This is primarily a bugfix release. The most significant changes are,

• Fixed a macro hygiene bug in Generic1 (thanks to Alexandre
  Archambault)

• Several fixes and improvements in HList and Coproduct rotations
  (thanks to Alexandre Archambault).

• Added a prepend operation for Coproducts. Prepend of an HList to HNil
  no longer rebuilds the entire HList (thanks to Alexandre Archambault).

• Added a method to transform the value at the focus of a Zipper (thanks
  to Peter Schmitz)

• Added an example illustrating the use of a coproduct Generic
  representation of an ADT to model a safe enumeration.

• shapeless is now cross built for Scala 2.12.0-M1.

• Snapshot builds are now published for Scala.js by Travis CI

• shapeless in now built with SBT 0.13.8.

​

Cheers,

Miles

--
Miles Sabin
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