What’s our requirement on being backward compatible with older versions of
This question was specifically prompted by realizing that the miniconda install created by
lsstsw/bin/deploy only install Astropy 1.2.1 and matplotlib 1.5.1.
The current versions of those are AstroPy 2.0.1 and matplotlib 2.0.2.
The two specific features I wanted to use are
overwrite=True for ASCII tables in AstroPy and a certain matplotlib.pyplot.figure construction. Neither are key, but doing it to support Astropy 1.2 or matplotlib 1.5 would result in code that looks outdated and indirect compared to the features in 2.0