Add a CI workflow. #1

	name: CI
	on:
	pull_request:

	env:
	FORCE_COLOR: "1"

	defaults:
	run:
	shell: bash

	# Cancel active CI runs for a PR before starting another run
	concurrency:
	group: ${{ github.ref }}
	cancel-in-progress: true

	jobs:
	config:
	name: "${{ matrix.package }}: ${{ matrix.target }}"
	runs-on: macOS-latest
	strategy:
	matrix:
	target: [ "iOS", "tvOS", "watchOS" ]
	package: [ "BZip2", "XZ", "libFFI", "mpdecimal", "OpenSSL" ]
	steps:
	- name: Checkout
	uses: actions/[email protected]

	- name: Set up Python
	uses: actions/[email protected]
	with:
	python-version: "3.X"

	- name: Build ${{ matrix.package }} for ${{ matrix.target }}
	run: \|
	# Do the build for the requested target.
	make ${{ matrix.package }}-${{ matrix.target }}

	- name: Upload Build Artifact
	uses: actions/[email protected]
	with:
	name: dist-${{ matrix.package }}-${{ matrix.target }}
	path: dist
	if-no-files-found: error

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