which have moved into `base-4.9`.

Specifically these are for the (new)types:

 - `Data.List.NonEmpty`
 - `Data.Semigroup.Arg`
 - `Data.Semigroup.First`
 - `Data.Semigroup.Last`
 - `Data.Semigroup.Max`
 - `Data.Semigroup.Min`
 - `Data.Semigroup.Option`
 - `Data.Semigroup.WrappedMonoid`

Fixes #11

Advances #10

Fixes #4

Advances #6

Make NFData (Proxy a) instance poly-kinded

Disallow building with GHC-7.2 + array-0.4

```
[1 of 1] Compiling Control.DeepSeq  ( Control/DeepSeq.hs, dist/dist-sandbox-c66cf055/build/Control/DeepSeq.o )

Control/DeepSeq.hs:91:1:
    ghc-prim:GHC.Generics can't be safely imported! The module itself isn't safe.
```

Follow-up to cdfcdee1

Follow-up to cdfcdee1

Signed-off-by: Austin Seipp <austin@well-typed.com>

This is fallout from de1bc894

Let's use a minor bump because dropping redundant constraints is
something that affects the type-signatures and could require to be
detectable in client-code via `MIN_VERSION_deepseq()`.

de1bc894 dropped a few redundant constraints, some of which are not yet
redundant in prior GHC/base versions.

[skip ci]

...and detabify deepseq.cabal file

This does not use ChasingBottoms as we're interested in testing each
field is evaluated exactly once which ChasingBottoms doesn't provide
afaics.