fix: fix bug with empty list for validation #46

	---
	name: Linting

	on:
	pull_request:
	branches:
	- main

	push:
	branches:
	- main

	jobs:
	Linting:
	runs-on: ubuntu-latest
	steps:
	# check-out repo
	- name: Checkout repository
	uses: actions/checkout@v4
	with:
	ref: ${{ github.head_ref }}
	# install poetry
	- name: Install poetry
	run: pipx install poetry==1.6.0
	# set-up python with cache
	- name: Setup Python 3.8
	uses: actions/setup-python@v4
	with:
	python-version: '3.8'
	cache: 'poetry'
	# install requirements (including dev dependencies)
	- name: Install requirements
	run: poetry install --only lint
	# run linters
	- name: Run linters
	run: \|
	set -o pipefail
	poetry run make lint

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