add "application/xml" to dictionary of drivers

[fnattino]

Fix for #97

[TomAugspurger]

Thanks, can you add a small test for this?

And if you merge main and repush then the CI failures should be fixed.

[fnattino]

Hi @TomAugspurger , sure! I have added a test based on the single-file STAC that was already in the repo, checking whether the media types for all assets are listed in the drivers dictionary. I have also thought it was a good idea to check whether all common media types listed in PySTAC are also listed among the drivers, and realised that image/tiff is actually missing. Should I add it to the dictionary as well (I guess with rasterio as driver)?

[TomAugspurger]

Thanks, that would be great. Either here or as a followup would be fine.

[TomAugspurger]

Thanks @fnattino!