Improvements in High-Level API and Poe Tasks

[opcode81]

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• I have provided a description of the changes in this Pull Request
• I have added documentation for my changes
• If applicable, I have added tests to cover my changes.
• I have reformatted the code using poe format
• I have checked style and types with poe lint and poe type-check
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  (or a subset of them with poe test-reduced) ,and they pass
• (Optional) I have tested that documentation builds correctly with poe doc-build

• Add an option to SamplingConfig which allows to configure number of test episodes
• Make OptimizerFactory more flexible, adding method create_optimizer_for_params
• Fix AutoAlphaFactoryDefault using hard-coded Adam optimizer
• Fix mypy issues that were platform/installation-dependent
• Limit scope of nbqa, resolving issues with files generated by old versions of the build

Fixes #1054

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (8742e36) 88.18% compared to head (eeb2081) 88.18%.

Files	Patch %	Lines
tianshou/highlevel/optim.py	90.00%	1 Missing ⚠️
tianshou/highlevel/params/alpha.py	50.00%	1 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1055   +/-   ##
=======================================
  Coverage   88.18%   88.18%           
=======================================
  Files         100      100           
  Lines        8160     8170   +10     
=======================================
+ Hits         7196     7205    +9     
- Misses        964      965    +1     

Flag	Coverage Δ
unittests	88.18% <88.88%> (+<0.01%)	⬆️

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[opcode81]

Recommend to merge without squashing.

[MischaPanch]

The windows CI job fails b/c you changed pyproject and something about caching fails. I'll delete the current github caches before merging to master, that should fix it