Add support for macOS

[louisdh]

Would it make sense to add support for macOS?
This would require some type aliases, similarly as I've done in my BezierPath+Length project.

To be clear: I'd like to take this task upon me, but would like a green light before I start 🙂 to make sure it fits the vision for the VectorBoolean project.

[lrtitze]

That sounds like it'd be worthwhile if you're still interested. I've been extremely busy working on the project for which I created this port, so I'm only now able to get back to you. Sorry.