MAINT: Pin gym[atari] version

[melissawm]

This fixes CI but doesn't totally get all of #87 yet.

[rossbar]

FTR this shouldn't have any affect on the CI, since the workflow uses pip (i.e. requirements files) rather than conda. +1 for the change though as we need to keep requirements.txt and environment.yml in sync (a bot that did this automatically would be great!)

The CI failures are related to failing to grab some Debian packages required to build the atari-py wheel locally. Maybe try adding sudo apt-get update prior to the line that apt-get's cmake and ffmpeg?

[melissawm]

Ah - we were having a failing run on CI because atari-py (or gym) couldn't fetch the rom with the new version, but this other failure is also weird. Let me do that.

[melissawm]

Ok - I see this warning on CircleCI: https://circleci.com/docs/2.0/circleci-images/

Legacy images with the prefix "circleci/" will be deprecated on December 31, 2021. For faster builds, upgrade your projects with next-generation convenience images

It might be worth just updating to the new cimg/python:3.8 image instead?

[rossbar]

Yeah definitely, though that will also probably necessitate even more apt-get-ing because IIRC the python images are stripped down to the bare minimum needed to support Python.

We need to do it anyways so +1 for doing it here.

[melissawm]

It works! 🎉

[rossbar]

LGTM, thanks for chasing down the right recipe @melissawm !

It'd be great to tear out all the build-our-own-wheels stuff eventually, but we'll have to tackle #87 to get there