Add attribution field to challenge.yml spec #91

	---
	name: Testing

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	python-version: ['3.8', '3.9', '3.10', '3.11']

	name: Testing
	steps:
	- uses: actions/checkout@v3
	- name: Setup python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	architecture: x64
	- name: Install dependencies
	run: \|
	pip install poetry
	poetry install

	- name: Test
	run: poetry run make test

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