Preserve transparency in palette-based PNG #42

	name: Python CI

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

	jobs:
	build:

	runs-on: ubuntu-20.04
	strategy:
	max-parallel: 4
	matrix:
	python-version: ["3.11", "3.10", "3.9", "3.8", "3.7", "3.6"]

	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 tox tox-gh-actions
	- name: Run Tests
	run: tox

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