This change updates z2d to 0.12.1 and changes the sprite font path
insetting functionality to use the new path offset abilities released in
the update.
In addition, there has been a slight change to the drawing of E0B5 and
its respective reflection; we now add a 1-pixel horizontal line segment
to each end to force them to be perpendicular. This is because
offsetting pre-expands the curves and ultimately causes the end segments
of the curve itself to have slight non-horizontal angles, which produce
small artifacts at the ends without the forced horizontal ends.
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