ghc-exceptions-0.8.2.1-3.1

- update to  0.8.2.1
  * Support for throwing in the template-haskell Q monad
  * Support for transformers 0.5

- update to 0.8.0.2
  * Use `transformers-compat` to allow support for `ExceptT` even on older `transformers` versions.
  * `stm` support

- remove unnecessary build requires

- Initial packaging (version 0.6.1)

- Update Cabal build instructions to support ghc-8.6.1.

- Cosmetic: replace tabs with blanks, strip trailing white space,
  and update copyright headers with spec-cleaner.

- Update exceptions to version 0.10.0.
  0.10.0
  - -----
  * Fix a regression in 0.9.0 whereby the non-IO effects in `bracket`'s `use`
    action were not visible to the `release` action, and the non-IO effects in the
    `release` action were not visible after the `bracket` call.
  * The type of `generalBracket` was changed in order to restore those non-IO
    effects, so if you are a library author that provides a `MonadMask` instance,
    you will need to update your implementation of this method.
  * Add `MonadMask` instance for `MaybeT`
  * Add `onError` function whose action also runs on errors which are not
    exceptions, such as a `Nothing` or a `Left`.
  0.9.0
  - ----
  * Add `generalBracket` to the `MonadMask` typeclass, allowing more
    valid instances.
    Note that functions such as `bracket` and `finally` are now based off of
    `generalBracket`, so if you are a library author that provides a `MonadMask`
    instance, you will need to provide an implementation of this method.
  * Add `MonadMask` instances for `ExceptT` and `ErrorT`

- Prefer the new %license attribute over %doc.
- Update Cabal file to revision 5.
  * support GHC 8.4.x
  * support QuickCheck 2.11.x