Reenable polysemy

[isovector]

Checklist:

• Meaningful commit message, eg add my-cool-package (please not mention build-constraints.yml)

• At least 30 minutes have passed since uploading to Hackage

• On your own machine, in a new directory, you have successfully run the following set of commands (replace $package with the name of the package that is submitted, and $version with the version of the package you want to get into Stackage):

  stack unpack $package-$version  # $version is optional
  stack init --resolver nightly
  stack build --resolver nightly --haddock --test --bench --no-run-benchmarks
  

---

Y'all didn't inform me of the breakage!

[isovector]

I don't know why CI is failing here. Can someone from the stack team please help?

[cdornan]

@isovector the check failed because dependent packages loopbreaker and unagi-chan are not in nightly atm. Leave it with me for now — shpould be able to get it into nightly on Monday.

[isovector]

Thanks @cdornan --- we really appreciate the air support on this!

[DanBurton]

As Chris mentioned, this required re-enabling loopbreaker and unagi-chan.

loopbreaker may not be functioning correctly on ghc 8.8; I've marked this as an expected test failure for now, but note that this may cause performance regressions. polysemy-research/loopbreaker#10