feat: add --format flag and *ErrorsFormatter classes (#482) #386

	# This workflow will install Python dependencies, run tests with a variety of Python versions
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

	name: Python package

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

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11"]

	timeout-minutes: 5
	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
	pip install poetry
	- name: Setup package dependencies
	run: \|
	poetry install
	- name: Run linter
	run: \|
	poetry run flake8
	- name: Run tests
	run: \|
	poetry run pytest

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