v0.5.2

This release includes several minor bugfixes:

• ensures that calling BezierCurve.split(from:, to:) on a set of ranges creates a series of curves that are exactly continuous
• fixes a crash when creating an instance of Path from a cgPath which has a subpath that was started without a move(to:) command
• fixes behavior of Path.intersections(with:) for with open paths that intersect at end points.