4.3.1: Build and deploy macOS wheels

What's Changed

• Build wheels for macOS by @ericcanton in #30
• Bump version from 4.3.0 to 4.3.1 by @ericcanton in #31
• add CI job updates too by @ericcanton in #32

This release adds CI jobs and C++ build arguments for macOS platforms. Previously this worked for users installing from source from this repo, but releases published nothing to PyPI for macOS. Existing users on Linux or who have built from source can safely skip this update.

Full Changelog: 4.3.0...4.3.1