v0.4.0

New features:

• adds ability to split path components with PathComponent.split(from:, to:)
• adds utility method for enumerating over points of PathComponent with option to include or exclude control points PathComponent.enumeratePoints(includeControlPoints:, using:)
• allows subclassing of Path and PathComponent
• adds Comparable support to IndexedPathLocation and IndexedPathComponentLocation
• adds distanceSquared function between points

bugfixes

• fixes a memory leak in vector boolean operations
• improves support for converting to and from CoreGraphics paths that have single point subpaths