pre-release for v2022.06.0

There’s a few unreleased and potentially breaking changes in main, most importantly the index refactor and the new groupby using numpy-groupies and flox. During the meeting on Wednesday we decided to release a preview version to get feedback before releasing a full version, especially from those who don’t run their tests against our main branch.

I am planning to create the pre-release tomorrow, but if there’s any big changes that should be included please post here.

cc @TomNicholas

Edit: the version will be called 2022.05.0.dev0, which will ensure that e.g. pip will require the --pre flag to install it.

[keewis]

I just published the pre-release, it can be installed from PyPI:

mamba create -n <name> python=3.10 xarray
python -m pip install --pre --upgrade --no-deps xarray

(the --no-deps is important, otherwise we pull the pre-releases of other packages)

[dcherian]

I’ll issue the release once #6798 goes in.