Catboost seems failing, they're infamously slow to release for new dependencies, you can ignore them for now for this CI with a todo ideally pointing to an existing issue (or one you'd create) on the catboost repo.

• The docs build seems to be failing because of the fetch_california_housing 403 error - https://app.readthedocs.org/api/v2/build/30885603.txt - we can use this temp solution if needed
• I commented out catboost in the 1.8 deps and added a comment to see things pass but not sure if you want it to remain like this?

The fetch california housing issue seems to be what we have in scikit-learn too.