fix astropy WCS version related issue: we can't test round tripping because it doesn't work because of outstanding astropy-wcslib issues. Most likely, astropy/4292 (https://github.com/astropy/astropy/issues/4292) will solve this.
fix astropy WCS version related issue: we can't test round tripping
because it doesn't work because of outstanding astropy-wcslib issues.
Most likely, astropy/4292
(https://github.com/astropy/astropy/issues/4292) will solve this.

keflavich/spectral-cube,radio-astro-tools/spectral-cube,e-koch/spectral-cube,jzuhone/spectral-cube,low-sky/spectral-cube