fix: send error msg via slack when failed #89

	name: Lint

	on: [push]

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- name: checkout
	uses: actions/checkout@v3
	- name: install poetry
	run: pipx install poetry
	- name: use python
	uses: actions/setup-python@v4
	with:
	python-version: "3.10"
	cache: poetry
	- name: install black, pylint
	run: poetry install --only dev
	- name: check if code linted
	run: \|
	poetry run black --check $(git ls-files '*.py')
	poetry run pylint --recursive=yes $(git ls-files '*.py') \|\| true

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