AstroJacobLi/smplotlib: v0.0.9

In this release, I fixed a bug in the Hershey Complex Heavy font (thanks to @yangcht) and a bug when displaying the scatter plot (thanks to @fdeugenio). I also improved the interface function by enabling heavy and light fonts. Users can use the following function to customize many settings: smplotlib.set_style(usetex=False, fontsize=15, fontweight='normal', figsize=(6, 6), dpi=120, edgecolor='black').