Remove 7.4.1 as it's broken upstream.

Prepare 0.8.7.0

Haddock markup fixes

  * Use the standard `@since` notation (since it plays well with
    re-exports in other packages)
  * Use `@ ... @` for monospacing things that aren't identifiers
  * Qualify some linked identifiers (so that they actually link)

'Binary (NonEmpty a)' should 'fail' on empty lists

Co-Authored-By: harpocrates <alec.theriault@gmail.com>

Compatibility with future ghc-8.8/base-4.13

Typofix

Remove unused imports.

Add support for Int16#, Word16#

Due to a bug in ghc, some unused imports do not yield warnings.
This commit will remove such unused imports in preparation for
the ghc bug fix (see https://ghc.haskell.org/trac/ghc/ticket/13064).

Add GHC 8.6.1 to travis and docker.

Add support for Int8Rep/Word8Rep added in GHC 8.7

The failure should be in the context of 'MonadFail'.

There was no breaking changes in version 0.10.0.0,
so let's also release under 0.8.6.0.

GHC gave a warning that we needed modules but didn't explicitly depend
on them in the .cabal file.

Add Binary instance for Identity, from base-4.8.0.0

Don't use * as Type in the presence of TypeOperators

Fix CI