CHANGES:

• predicate combinators: and_pred and or_pred

• feat pp: add a bunch of extensions

• Kleisli Composition Operator and Apply_or for option/result/fun (#455)

• add CCByte_buffer.to_slice

• add a byte slice type CCByte_slice

• add cons_when to CCListLabels

• add (|||>) and ||> to CCFun

• CCVector: Add function foldi

• add containers.pvec, a persistent vector type.

• perf: use a monomorphic impl for CCMonomorphic.{min,max}