added known issues in README.md #24

	name: tests

	on:
	push:
	pull_request:
	branches:
	- main

	jobs:
	build-linux:
	runs-on: ubuntu-latest
	strategy:
	max-parallel: 5

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python 3.9
	uses: actions/setup-python@v2
	with:
	python-version: 3.9
	- name: Add conda to system path
	run: \|
	# $CONDA is an environment variable pointing to the root of the miniconda directory
	echo $CONDA/bin >> $GITHUB_PATH
	- name: Install dependencies
	run: \|
	pip install -r requirements/requirements.txt
	pip install -r requirements/development.txt
	- name: Lint with flake8
	run: \|
	conda install flake8
	# stop the build if there are Python syntax errors or undefined names
	flake8 cytoself --count --select=E9,F63,F7,F82, --ignore=E203, --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	flake8 cytoself --count --exit-zero --max-complexity=15 --max-line-length=127 --statistics
	- name: Generate coverage report
	run: \|
	pip install pytest
	pip install pytest-cov
	pytest --cov=./cytoself --cov-report=xml
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v2
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	fail_ci_if_error: true
	flags: unittests
	verbose: true
	project: off
	patch: off

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