regenerate haskell nix file (drops hex dependency)
apply ormolu to a few files
fixup cabal file
add polysemy logger interpretation of Output, fix bug in nixEvalSem bug
* nixEvalSem was accidentally not stripping the output
create test_data and simplify RewriteSpec to use it
move Polysemy interpretation stacks closer to where polysemy methods are made
eventually these will move more top level but for now this keeps it
more contained
update to ghc883, remove raw-strings-qq dep
No functional change; this pulls out all of the changes except the `polysemy`
refactoring from here:
https://github.com/ryantm/nixpkgs-update/pull/172
This will allow us to do development with the newer GHC and cleaned up
dependency stack, start using the `hspec` test suite, vet the `github` library
updates, etc., while we work on porting more of the effects to polysemy and
evaluating how it looks.
