Add max version for numpy to allow for shap compatibility

[sudrich]

Fixes #1761.

Summary

Introduce a max version for numpy to ensure compatibility with the current version of shap (see here for context on the issue).

Other Information

[dennisbader]

The issue here is that the shap repo doesn't seem to be very active, and that the fix is not coming anytime soon (see here). We can fix the numpy version for now but have to think about an alternative before releasing any new Darts version.

[sudrich]

The issue here is that the shap repo doesn't seem to be very active, and that the fix is not coming anytime soon (see here). We can fix the numpy version for now but have to think about an alternative before releasing any new Darts version.

Yes. There seems to be a fork that wants to take over development (see here). We should probably migrate once they are ready to publish their first version.

[dennisbader]

I opened a new PR that addresses other fixes for current unit tests (from new statsmodels version). Let's continue in #1766. Will close this one.

[sudrich]

I opened a new PR that addresses other fixes for current unit tests (from new statsmodels version). Let's continue in #1766. Will close this one.

Thanks for fixing the issue. I saw it arise last week, but didn't have the time to look deeper into it over the weekend.

[akshika47]

In the meantime I used Python=3.8 and Numpy=1.19.0 versions to get things running but I don't know what other issues that may arise :)