Add date for removal of deprecated discovery functions #769

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

	name: Run Tests

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

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/[email protected]
	- name: Set up Python 3.8
	uses: actions/[email protected]
	with:
	python-version: 3.8
	- name: Install dependencies
	run: \|
	pip install -r requirements.txt
	pip install -r requirements-test.txt
	- name: Lint with flake8
	run: \|
	flake8 --exclude cast_channel_pb2.py,authority_keys_pb2.py,logging_pb2.py examples pychromecast
	- name: Lint with pylint
	run: \|
	pylint examples pychromecast
	- name: Check formatting with black
	run: \|
	black examples pychromecast --check --diff

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