Test notebooks

[fracek]

Like we mentioned, this PR add testing of notebooks.

[fracek]

Looks like the issue now is that the GBT notebook uses gurobi. We should stick to cbc for all notebooks so that everyone can try them out and we can test them. What do you think?

[rmisener]

Agreed. @ThebTron, would you please switch to CBC in the black-box optimization notebook? Maybe try making the trees smaller in LightGBM if there is computational trouble with CBC.

[codecov[bot]]

Codecov Report

Merging #30 (4c8901a) into main (139eb3d) will not change coverage. The diff coverage is n/a.

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##             main      #30   +/-   ##
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  Coverage   88.79%   88.79%           
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  Files          23       23           
  Lines        1071     1071           
  Branches      160      160           
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  Hits          951      951           
  Misses         98       98           
  Partials       22       22           

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[fracek]

The issue was that the second test run (the one testing notebooks) was overwriting the coverage from the main tests. I changed the notebook run to merge coverage with the main tests.

[rmisener]

In this pull request, import_network.ipynb still mixes ReLU and sigmoid activation functions. @fracek, possible to just make sure that the activation functions are ones we typically allow together?

[fracek]

I changed it to not use sigmoid anymore.