pykat 1.2.1 incompatible with matplotlib > 3.3
the set_clim method for colorbars doesn't work anymore since matplotlib 3.3: https://github.com/matplotlib/matplotlib/blob/a8831d57207db5e9bf681e30810ce0ea146f4a31/doc/api/prev_api_changes/api_changes_3.3.0/removals.rst
MWE: https://git.ligo.org/IFOsim/Finesse_playground/-/blob/master/daniel_brown/cavity_maps.py
I believe this can be fixed by updating https://git.ligo.org/finesse/pykat/-/blob/master/pykat/optics/maps.py with the new syntax.