Revert "parser: allow script to be empty" #61

	name: Test

	on: [push, pull_request, workflow_dispatch]

	env:
	FORCE_COLOR: 1

	jobs:
	test:
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	python-version: ["2.7", "3.7", "3.8", "3.9", "3.10", "3.11"]
	os: [ubuntu-latest, macos-latest, windows-latest]

	steps:
	- uses: actions/checkout@v2

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

	- name: Get pip cache dir
	id: pip-cache
	run: \|
	echo "::set-output name=dir::$(pip cache dir)"

	- name: Cache
	uses: actions/cache@v2
	with:
	path: ${{ steps.pip-cache.outputs.dir }}
	key:
	${{ matrix.os }}-${{ matrix.python-version }}-v1-${{ hashFiles('**/requirements.txt') }}
	restore-keys: \|
	${{ matrix.os }}-${{ matrix.python-version }}-v1-

	- name: Install dependencies
	run: \|
	python -m pip install -U pip
	python -m pip install -U wheel
	python -m pip install -Ur requirements.txt
	python setup.py install

	- name: Test
	run: \|
	make tests

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