Add ability to get layer digests #72

	---
	name: validation

	on: # yamllint disable-line rule:truthy
	pull_request:
	push:
	workflow_dispatch:

	jobs:
	tox:
	name: Run unit tests and linters
	runs-on: ubuntu-latest
	strategy:
	matrix:
	version: ["3.8", "3.9", "3.10", "3.11"]
	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.version }}
	- name: Setup Python
	run: \|
	pip install tox tox-pdm pdm
	pdm venv create ${{ matrix.version }}
	source .venv/bin/activate

	- name: Tox
	run: tox

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