Return system exit code when running as module #369

	name: CI
	on:
	pull_request:
	paths:
	- "terraform_compliance/**"
	- ".github/workflows/ci.yml"
	- "tox.ini"
	- "Dockerfile"
	- "requirements.txt"
	- "requirements_dev.txt"

	jobs:
	build:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	python-version: ['3.7', '3.8', '3.9', '3.10']

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements_dev.txt

	- name: Run unit tests
	run: \|
	pytest tests/terraform_compliance

	- name: Build
	run: \|
	python setup.py sdist bdist_wheel
	pip install dist/terraform_compliance-0.0.0-*.whl

	- name: Run integration tests
	run: \|
	python tests/functional/run_functional_tests.py

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