Refactor UQ tests

[yonatank93]

Address issue #126

I collected the common variables and put them into conftest.py. Then, I slightly rewrite the tests to use pytest fixtures.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.10%. Comparing base (1c2720d) to head (21f632c).
Report is 16 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #192      +/-   ##
==========================================
+ Coverage   65.07%   65.10%   +0.02%     
==========================================
  Files          41       41              
  Lines        4075     4075              
==========================================
+ Hits         2652     2653       +1     
+ Misses       1423     1422       -1     

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[yonatank93]

@mjwen Aside from this refactoring test, I want to check if all dependencies need to be registered in Pypi. I am referring to #114 , if I need to upload my fork of ptemcee to Pypi. I am actually planning on maintaining my fork in the future.

[mjwen]

Thanks @yonatank93!

This is great!

if all dependencies need to be registered in PyPI

Not really. I have updated setup.py to allow installing directly from your fork. See #193

If everything is OK, I can merge this PR.

[yonatank93]

For refactoring UQ test, I think that's all.