Update Nix to 22.05

[wd15]

A change was required due to a change in the Sfepy API. Using a custom Sfepy version (not Nix version as that's broken in 22.05 (but fixed on master)).

Other things:

• Other code changes are for the linters
• Switch to use mamba instead of conda for building from environment.yml
• Use GitHub Actions for tests

[review-notebook-app[bot]]

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[wd15]

The actions are running here, https://github.com/wd15/pymks/actions

It's not showing up in the boxes for some reason. Probably will work when this is merged.

[wd15]

@beyucel : ready for your review now

[beyucel]

@wd15 I ran all the tests (code and notebooks). Only the graph-descriptors notebook failed. I think failure happened due to this error/warning distributed.nanny - WARNING - Restarting worker [on cells 11 and 12].

It computed the descriptors after the warning but got stuck at line 23 pipeline.fit. (I only ran that line 23 for 10 min)

I know this update is about fixing the sfepy but I wanted to let you know.

[wd15]

@wd15 I ran all the tests (code and notebooks). Only the graph-descriptors notebook failed. I think failure happened due to this error/warning distributed.nanny - WARNING - Restarting worker [on cells 11 and 12].

It computed the descriptors after the warning but got stuck at line 23 pipeline.fit. (I only ran that line 23 for 10 min)

I know this update is about fixing the sfepy but I wanted to let you know.

Probably memory issues?