[MRG] Update GitHub actions

[gtdang]

Runners were no longer finding the conda base version preventing gh runners to build.

• Updating the setup-miniconda line to version 3 seemed to fix the problem.
• Updated the checkout action to v4.
• Changed fetch-depth to 2 because it was stalling on codecov step on linux runners. source
• Updated to use codecov upload action v4 instead of shell command

setup-miniconda
checkout

[gtdang]

@ntolley @jasmainak @rythorpe
I will need to work with someone who has access to the codecov token to set-up the secret for the repository. Can someone meet with me tomorrow for this?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.69%. Comparing base (d28ddb7) to head (c167263).
Report is 32 commits behind head on master.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #758      +/-   ##
==========================================
+ Coverage   92.67%   92.69%   +0.02%     
==========================================
  Files          27       27              
  Lines        4928     4969      +41     
==========================================
+ Hits         4567     4606      +39     
- Misses        361      363       +2     

Flag	Coverage Δ
unittests	92.69% <ø> (?)

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[gtdang]

@ntolley @jasmainak @rythorpe I will need to work with someone who has access to the codecov token to set-up the secret for the repository. Can someone meet with me tomorrow for this?

Actually we don't need to meet for this if one of you can do it following these directions. Note the token is needed for PRs that come from within the org. It switches to token-less uploading if the PR is coming from a forked repository. See more information here.

[jasmainak]

I'll try to help if I can find a moment tomorrow ...

[ntolley]

@jasmainak looks like we need access to the jonescompneurolab account to get the secret generated by codecov.

In any case this PR doesn't really depend on that update so I'm going to go ahead and merge.