Bump tox from 4.15.0 to 4.15.1 in /requirements #547

	name: Tests
	on:
	push:
	branches:
	- master
	- '*.x'
	paths-ignore:
	- 'docs/**'
	- '*.md'
	- '*.rst'
	pull_request:
	branches:
	- master
	- '*.x'
	paths-ignore:
	- 'docs/**'
	- '*.md'
	- '*.rst'
	jobs:
	tests:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	include:
	- {name: Linux, python: '3.9', os: ubuntu-latest, tox: py39}
	- {name: '3.8', python: '3.8', os: ubuntu-latest, tox: py38}
	- {name: '3.10', python: '3.10', os: ubuntu-latest, tox: py310}
	- {name: '3.11', python: '3.11', os: ubuntu-latest, tox: py311}
	- {name: 'PyPy', python: pypy-3.8, os: ubuntu-latest, tox: pypy38}
	- {name: 'mypy', python: '3.9', os: ubuntu-latest, tox: typing}
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python }}
	- name: Install APT dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install libmemcached-dev memcached redis
	sudo systemctl stop memcached
	sudo systemctl stop redis-server
	- name: update pip
	run: \|
	pip install -U wheel
	pip install -U setuptools
	python -m pip install -U pip
	- name: get pip cache dir
	id: pip-cache
	run: echo "::set-output name=dir::$(pip cache dir)"
	- name: cache pip
	uses: actions/cache@v2
	with:
	path: ${{ steps.pip-cache.outputs.dir }}
	key: pip\|${{ runner.os }}\|${{ matrix.python }}\|${{ hashFiles('setup.py') }}\|${{ hashFiles('requirements/*.txt') }}
	- run: pip install tox
	- run: tox -e ${{ matrix.tox }}

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