Log Message:
py-fonttools: updated to 3.25.0

3.25.0:
[varLib] Improved support-resolution algorithm. Previously, the on-axis masters \ 
would always cut the space. They don’t anymore. That’s more consistent, and \ 
fixes the main issue Erik showed at TYPO Labs 2017. Any varfont built that had \ 
an unusual master configuration will change when rebuilt
[varLib.models] Added a main() entry point, that takes positions and prints \ 
model results.
[varLib.plot] Added new module to plot a designspace’s VariationModel. \ 
Requires matplotlib.
[varLib.mutator] Added -o option to specify output file path
[otTables] Fixed IndexError while pruning of HVAR pre-write
[varLib.models] Convert delta array to floats if values overflows signed short \ 
integer