Bump actions/cache from 1 to 3 #15

	name: CI

	on: [push]

	jobs:

	test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version:
	- "3.7"
	- "3.8"
	- "3.9"
	- "3.10"
	steps:
	- uses: actions/checkout@v1
	with:
	fetch-depth: 1

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

	- uses: actions/cache@v3
	with:
	path: ~/.cache/pip
	key: ${{ runner.os }}-pip-${{ hashFiles('**/tests.txt') }}
	restore-keys: \|
	${{ runner.os }}-pip-

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install tox tox-gh-actions

	- name: Tox tests
	run: \|
	tox

Provide feedback