Update tox to 4.8.0 #933

	name: CI

	on:
	push:
	branches:
	- '**' # run on all branches
	pull_request:
	branches:
	- '**' # run on all branches
	# allows you to run this workflow manually from the Actions tab
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ['3.8', '3.9', '3.10']
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Cache pip packages
	uses: actions/cache@v2
	env:
	cache-name: cache-pypi-modules
	with:
	# pip cache files are stored in '~/.cache/pip' on Linux
	path: ~/.cache/pip
	# look to see if there is a cache hit for the corresponding
	# requirements file
	key: \|
	${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('requirements/install.pip', 'requirements/develop.pip', 'requirements/test.pip', 'requirements/doc.pip') }}
	restore-keys: \|
	${{ runner.os }}-build-${{ env.cache-name }}-
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements/install.pip
	pip install -r requirements/develop.pip
	pip install -r requirements/test.pip
	pip install -r requirements/doc.pip
	- name: Lint with flake8
	run: \|
	flake8 htheatpump tests samples setup.py
	- name: Test with pytest
	run: \|
	pytest htheatpump tests samples
	- name: Build the doc
	working-directory: ./docs
	run: \|
	sphinx-build -b html . _build

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