Add ruff checks and correct linting errors #33

	name: Linters

	on:
	pull_request:
	paths-ignore:
	- 'docs/**'
	push:
	paths-ignore:
	- 'docs/**'

	jobs:
	mypy:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.11'

	- name: Install mypy
	run: python -m pip install mypy~=1.5.1 mscerts

	- name: Execute mypy
	uses: liskin/gh-problem-matcher-wrap@v1
	with:
	linters: mypy
	run: mypy

	black:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: psf/black@stable
	with:
	options: "--check --verbose"
	src: "./signify"
	version: "~= 23.7"

	ruff:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- uses: chartboost/ruff-action@v1
	with:
	src: "./signify"

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