By default assume HOST is localhost for postgres databases. #423

	---
	name: Test

	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install -r requirements/tests.txt
	python -m pip install -r requirements.txt
	# TODO: Remove this conditional when Python 3.7 is dropped and Flake8 executes on
	# all Python versions in matrix.
	- if: matrix.python-version == '3.8'
	name: Linting
	run: flake8
	# Environments are selected using tox-gh-actions configuration in tox.ini.
	- name: Test with tox
	run: tox -r
	- name: Upload coverage
	uses: codecov/codecov-action@v1
	with:
	name: Python ${{ matrix.python-version }} Codecov

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