updated dependency on black #15

	# .github/workflows/build.yaml
	name: distgfs CI

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10"]

	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

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

	- name: Install dependencies
	run: \|
	sudo apt update -y && sudo apt upgrade
	sudo apt install build-essential mpich
	python -m pip install --upgrade pip
	python -m pip install tox tox-gh-actions

	- name: Run tox
	run: tox

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