BooleanOperations is now a pure-python package. It requires the external pyclipper Cython wrapper for the C++ Clipper library, available at https://pypi.org/project/pyclipper.
0.4
Use fonttools AreaPen for clockwise test instead of ClockwiseTestPointPen (removed in defcon/ufo3 branch)
0.3
Prefer ufoLib over robofab.ufoLib if present. Fix bug triggering AssertionError for paths with initial move. Export BooleanOperationManager methods as standalone, top-level functions.