ci: Add macOS x86_64 and arm64 build jobs. #201

	name: Build MicroPython

	on:
	push:
	branches: '*'
	pull_request:
	branches: '*'

	jobs:
	build:
	strategy:
	matrix:
	# macos-13 is x86_64, and macos-14 is arm64
	os: [ubuntu-22.04, macos-13, macos-14]
	fail-fast: false
	runs-on: ${{ matrix.os }}
	name: build.py ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v3
	with:
	submodules: true
	- name: Setup arm-none-eabi-gcc v10.3
	uses: carlosperate/arm-none-eabi-gcc-action@v1
	with:
	release: 10.3-2021.10
	- name: Install CMake v3.22 & Ninja via PyPI
	run: python -m pip install cmake==3.28.3 ninja==1.11.1.1
	- name: Check Versions
	run: \|
	arm-none-eabi-gcc --version
	cmake --version
	ninja --version
	python --version
	- name: Build mpy-cross
	run: make -C lib/micropython/mpy-cross -j2
	- name: Build MicroPython
	shell: bash
	working-directory: ./src
	run: BUILD_VERBOSE=1 make -j2
	- name: Upload hex file
	uses: actions/upload-artifact@v3
	with:
	name: MICROBIT-MICROPYTHON-${{ github.sha }}-${{ matrix.os }}.hex
	path: src/MICROBIT.hex

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