Add support for 3.12, drop EOL 3.7 #59

	name: Test

	on: [pull_request]

	jobs:
	build:
	name: Test on ${{ matrix.os }} / Python ${{ matrix.python-version }}
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-20.04, windows-2019, macos-11]
	python-version: ['3.8', '3.9', '3.10', '3.11', '3.12.0-rc.3']
	steps:
	- uses: actions/checkout@v2
	with:
	submodules: true
	- name: Setup Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: python -m pip install -U setuptools wheel
	- name: Build package
	run: python -m pip install .
	- name: Run tests
	run: python -m unittest -v

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