Limit pandas to <2.0 for .pkl file compatibility

[bfhealy]

This PR limits the required pandas version to < 2.0 to avoid a TypeError with pickled ZTF files (see #231).

[mcoughlin]

@sahiljhawar I think the cache needs to be rebuilt now that Kasen has been updated.

[sahiljhawar]

@mcoughlin Can you link me the new Kasen model files?

[mcoughlin]

@Theodlz @bfhealy can you share?

[bfhealy]

Just shared on google drive! The latest models should also be available at the updated Zenodo (https://zenodo.org/record/8346985).

[sahiljhawar]

@bfhealy Can you share the Drive link with me as well? It will easier be to download.

[bfhealy]

@sahiljhawar I shared it with the gmail address associated with your profile on slack. Should I share it with a different address?

[sahiljhawar]

Yeah got it. For some reason it was in the Spam folder.

[sahiljhawar]

@mcoughlin @bfhealy Updated the models with new Kasen files. All the tests with Python 3.8 passed while the test for analysis.py on other Python version failed due to error in Corner (matplotlib).

[sahiljhawar]

@mcoughlin Issue was with the Matplotlib latest release. Updated the requirements. Does this needs to be reported to Bilby? Already created a issue on corner.py.

[mcoughlin]

@sahiljhawar thanks! and report as needed for sure.

[sahiljhawar]

@tsunhopang Can you please raise this issue in Bilby? The issue is neither reproducible locally, nor by the Corner (independent of Bilby).

PS: I have checked the relevant Bilby code, and I cannot see if the issue is arising from there.