explicitly install `ipython_genutils` (#6350)
explicitly install `ipython_genutils` (#6350)

* explicitly install ipython_genutils

* try upgrading sphinx [skip-ci]

* undo the upgrade [skip-ci]
markelg/xray,pydata/xarray,pydata/xarray,markelg/xray,pydata/xarray,jhamman/xarray,jhamman/xarray,jhamman/xarray,markelg/xray