Raise an error when faced with ambiguous CASTEP .cell #160

	name: Run tests

	on: [push, pull_request]

	jobs:
	test:

	runs-on: ubuntu-latest

	strategy:
	matrix:
	python-version: ['3.8', '3.9', '3.10', '3.11']
	name: Python ${{ matrix.python-version }}

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	cache: pip
	cache-dependency-path: setup.py

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install numpy
	python -m pip install -e '.[tests]'

	- name: Test
	run: pytest

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