Run mypy tests (but always pass) (#6568)
Run mypy tests (but always pass) (#6568)

* Run mypy tests (but always pass)

So we can at least see the result
pydata/xarray,jhamman/xarray,jhamman/xarray,markelg/xray,jhamman/xarray,pydata/xarray,markelg/xray,markelg/xray,pydata/xarray