Update dependency virtualenv to v20.28.1 - autoclosed #176

	name: RT-05 Actions

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.9]
	steps:
	- uses: actions/checkout@v2
	- name: Setup Python
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Show Python version
	run: python -c "import sys; print(sys.version)"
	- name: Install deps
	run: \|
	python -m pip install --upgrade pip
	pip install -r dev-requirements.txt
	- name: Run Black Check
	run: black --check src
	- name: Run Flake8
	run: pflake8 src
	- name: Run Mypy
	run: mypy src

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