Introduce coveralls for coverage reports #4

	name: lint-and-test
	on:
	pull_request:
	paths:
	- mfglib
	- tests
	- docs/source/*.py
	- pyproject.toml
	- .github/workflows/lint-and-test.yml
	jobs:
	lint-and-test:
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, windows-latest, macos-latest]
	python-version: ["3.8", "3.9", "3.10"]
	defaults:
	run:
	shell: bash
	runs-on: ${{ matrix.os }}
	concurrency:
	group: ${{ matrix.os }}-${{ matrix.python-version }}-${{ github.ref }}
	cancel-in-progress: true
	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- uses: snok/install-poetry@v1
	with:
	virtualenvs-create: true
	virtualenvs-in-project: true
	- name: Poetry version
	run: poetry --version
	- name: Install package
	run: poetry install
	- name: Activate venv
	run: source $VENV
	- name: Lint (black)
	run: poetry run black . --check
	- name: Lint (isort)
	run: poetry run isort . --check
	- name: Lint (ruff)
	run: poetry run ruff mfglib tests
	- name: Lint (mypy)
	run: poetry run mypy
	- name: Test (pytest)
	run: poetry run pytest
	- name: Upload coverage data to coveralls.io
	run: poetry run coveralls --service=github
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	COVERALLS_FLAG_NAME: ${{ matrix.os }}-${{ matrix.python-version }}
	COVERALLS_PARALLEL: true
	coveralls:
	name: Indicate completion to coveralls.io
	needs: lint-and-test
	runs-on: ubuntu-latest
	container: python:3-slim
	steps:
	- name: Finished
	run: \|
	pip3 install --upgrade coveralls
	coveralls --service=github --finish
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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