incompatibility with matplotlib 2.2+ #5
Description
when running the example readme code
/home/XXXXXX/anaconda3/lib/python3.6/site-packages/vispy/visuals/isocurve.py:22: UserWarning: VisPy is not yet compatible with matplotlib 2.2+
warnings.warn("VisPy is not yet compatible with matplotlib 2.2+")