matplotlib/matplotlib: REL: v3.4.1

This is the first bugfix release of the 3.4.x series. This release contains several critical bug-fixes: fix errorbar when specifying fillstyle fix Inkscape cleanup at exit on Windows for tests fix legends of colour-mapped scatter plots fix positioning of annotation fancy arrows fix size and color rendering for 3D scatter plots fix suptitle manual positioning when using constrained layout respect antialiasing settings in cairo backends as well