add an environment.yml file #77

	name: Test

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- "*"
	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.9]
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- uses: actions/cache@v2
	name: Configure pip caching
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ hashFiles('**/setup.py') }}
	restore-keys: \|
	${{ runner.os }}-pip-
	- name: Install dependencies
	run: \|
	pip install coverage ipykernel watermark
	pip install -r requirements-tests.txt
	python -m ipykernel install --user --name python3
	- name: Run tests and coverage
	run: \|
	coverage run -m unittest
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v2

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