fix is_subtype in pipelines.py #2

	### Defining the job to install dependencies

	name: Run Tests

	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout code
	uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: '3.8'

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pytest pytest-asyncio websockets

	- name: Run tests
	run: \|
	pytest

Provide feedback