Add: [Dependabot] introduce Dependabot to keep our workflows up-to-da… #459

	name: Testing

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	testing:
	name: Testing
	uses: OpenTTD/actions/.github/workflows/rw-entry-testing-docker-py.yml@v4
	with:
	python-path: master_server
	python-version: 3.8

	regression:
	name: Regression
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Set up Python 3.8
	uses: actions/setup-python@v4
	with:
	python-version: 3.8

	- name: Set up packages
	shell: bash
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.test
	pip install -r requirements.txt

	- name: Regression
	shell: bash
	run: \|
	PYTHONPATH=. pytest

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