Use fixed cabal-install-2.2

[phadej]

No description provided.

[alpmestan]

Fails on 8.4.3:

Failures:
  test/Servant/StreamSpec.hs:142:8: 
  1) Servant.Stream.Servant.Stream streams in constant memory
       predicate failed on: 22020096
Randomized with seed 1509620355

[phadej]

#931

I'm tempted to delete that test.

[alpmestan]

Let's delete it (or expect it to fail) yes, and use #931 to improve on that to get something useful, reliable and that passes. :)