0.9.52: Merge pull request #53 from newville/mpl_renderer

bug fixes:
fix broken "fill between"
fix use of "cached renderer" for Windows that was removed from matplotlib 3.6.0

0.9.51

update doc

0.9.50

fixes for Python 3.10 and wxPython 4.1.2 becoming stricter about using floats where ints are needed, a few minor fixes.

0.9.49

• add alpha and fill for line plots, include examples of using "fill to zero" and "fill for uncertainties".
• fix panning of images.

0.9.48

fixes critical flaws in 0.9.47

0.9.47

update doc

0.9.46

correctly auto-set margins even if using date data

0.9.45

update version, requirements

0.9.44

bug fixes, mostly for deprecations in matplotlib

0.9.43

ensure np array before looking for minpositive value