Add instances for NonEmpty

[phadej]

No description provided.

[lucasdicioccio]

Started something at lucasdicioccio@d748ab7 . I'll take some more time to actually test the thinggy and try whether GHC7 works with the same instance.

(currently using something along these lines at work on a newtype defined over NonEmpty).

[lucasdicioccio]

Obviously I mixed ToSchema and ToParamSchema in this quick fix before leaving :-). I'll do a proper one later.

[lucasdicioccio]

Ok, updated
my fix lucasdicioccio@a1dbad9 .

Do you want to discuss over the Pull Request or in this thread? In particular, should I add an instance for GHC<8?

[phadej]

please make a PR, and yes, please add a semigroups dependency, as

  if !impl(ghc >= 8.0)
    build-depends:
        semigroups  >= 0.18.3 && <0.19

(latest semigroups is 0.18.3 atm, no need to push lower bound down, as we won't test that anyway)

[fizruk]

Closed in 22e975e.