Add instructions on os.dupterm support and a test for exec #68

	name: ci

	on:
	push:
	paths-ignore:
	- "README.md"

	jobs:
	lint:
	name: lint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	- name: Install dev dependencies
	run: pip install -r dev-requirements.txt
	- name: Run linter
	run: ruff check

	test:
	name: test
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Build micropython
	env:
	CFLAGS_EXTRA: "-DMICROPY_PY_OS_DUPTERM=2" # os.dupterm support on unix
	run: \|
	git clone -b v1.24-release --single-branch https://github.com/micropython/micropython.git
	cd micropython
	git submodule update --init
	make -C mpy-cross
	cp mpy-cross/build/mpy-cross /usr/local/bin/
	make -C ports/unix
	cp ports/unix/build-standard/micropython /usr/local/bin/
	cd ..
	rm -rf micropython
	- name: Install test dependencies
	run: ./bin/setup
	- name: Install mosquitto
	run: sudo apt-get install -y mosquitto
	- name: Install the package dependencies
	run: "micropython -m mip install github:${{ github.repository }}@${{ github.ref_name }}"
	- name: Run tests
	run: micropython -m unittest
	env:
	MICROPYPATH: "${{ github.workspace }}:.frozen:~/.micropython/lib:/usr/lib/micropython:${{ github.workspace }}/tests/mocks"
	- name: Run integration tests
	run: ./bin/test_e2e

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