Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows #37

	# Build and publish wheels to PyPI
	# Build runs on every push
	# Publish runs only on a tag push
	# Note: This does not publish sdist
	name: Wheels

	on: [push, pull_request]

	jobs:
	build:
	name: Build wheel on ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, macos-latest, windows-latest]

	steps:
	- uses: actions/checkout@v2

	- uses: actions/setup-python@v2
	name: Install Python
	with:
	python-version: 3.8

	- name: Install cibuildwheel
	run: \|
	python -m pip install cibuildwheel==1.4.2

	- name: Build wheels
	env:
	# Skipping:
	# - PyPy (Mac OS): We get the runtime error "init_dgelsd failed init"
	# - Windows (32-bit) and Python 2.7
	# Refer: https://cibuildwheel.readthedocs.io/en/stable/cpp_standards/#windows-and-python-27
	CIBW_SKIP: pp-macosx cp27-win* *-win32
	CIBW_BEFORE_TEST: pip install -r test/python/requirements.txt
	CIBW_TEST_COMMAND: pytest {project}/test/python
	run: \|
	python -m cibuildwheel --output-dir dist

	- uses: actions/upload-artifact@v2
	with:
	name: dist
	path: ./dist

	publish:
	runs-on: ubuntu-latest
	needs: [build]
	if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/')
	steps:
	- uses: actions/[email protected]
	with:
	name: dist
	path: dist/
	- name: Publish to PyPI
	uses: pypa/gh-action-pypi-publish@master
	with:
	user: __token__
	password: ${{ secrets.PYPI_TOKEN }}

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