v0.6.0.0: Better UX + better docs + more tests + new functions

• #171:
  Add custom type errors to various functions and instances.

  • head, tail, last, init
  • words, unwords, lines, unlines
  • error
  • ToText, ToLText, ToString instances for bytestrings
  • Foldable1 instance for ordinary lists
  • Monad instance for Validation

  (by @vrom911, @chshersh)

• #164:
  Reexport ShortByteString, toShort/fromShort functions.
  (by @vrom911)

• #182:
  Support GHC-8.8.1.
  (by @chshersh)

• #168,
  #197:
  Improve documentation significantly (more and better examples, better wording).
  (by @chshersh,
  @vrom911,
  @Cmdv)

• #177:
  Improve usage of performance pragmas.
  (by @chshersh)

• #167:
  Rename functions (and deprecate old versions):

  • prec to prev
  • dupe to dup

  (by @Cmdv, @chshersh)

• #192:
  Reexport foldMap' from Data.Foldable.
  (by @tfausak)

• #201:
  Implement !!? as a safe equivalent of !! that returns a Maybe.
  (by @kutyel)

• #203:
  Implement the guarded combinator.
  (by @JonathanLorimer)

• #214:
  Add mapMaybeM function.
  (by @vrom911)

• #174:
  Implement bimapBoth in Relude.Extra.Tuple module,
  mark mapBoth as DEPRECATED.
  (by @astynax)

• #221:
  Improve documentation for the Validation module significantly.
  (by @chshersh)

• #176:
  Implement property-based tests for Validation laws.
  (by @astynax)

• #172:
  Add Monoid and Semigroup instances for the Validation type.
  (by @mauriciofierrom)

• #156:
  Implement helper type-level functions in Relude.Extra.Type.
  (by @TheMatten)

• #170:
  Implement Elem type family.
  (by @kutyel)

• #165:
  Re-export GHC.Float.atan2.
  (by @ethercrow)

• #155:
  Implement foldlSC — short-circuting list fold — in Relude.Extra.Foldable.
  (by @josephcsible)

• #158:
  Support GHC-8.6.5.
  (by @chshersh)

• #148:
  Migrate HLint rules to the latest Dhall spec.
  (by @vrom911)

• #178:
  Made die be polymorphic in its return type.
  (by @ilyakooo0)

• #162,
  #189,
  #190,
  #191,
  #193,
  #194,
  #195:
  Various refactorings and code improvements:

  • Breaking change: Reorder type parameters to asumMap
  • Implement andM, orM, allM, and anyM in terms of &&^ and ||^
  • Use foldr instead of explicit recursion and toList
  • Use mapToFst instead of zip to improve list fusion in inverseMap
  • Implement foldMap1 for NonEmpty in terms of foldr
  • Use $> instead of *> and pure where possible
  • Implement asumMap and foldMapA by coercing foldMap
  • Return Failure early in <* and *> too

  (by @josephcsible)

• #187:
  Remove tasty and tasty-hedgehog dependencies and their redundant imports.
  (by @dalpd)