updated to flake8 standards and fixed ci pipeline #6

	name: Linting

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

	jobs:
	lint:
	runs-on: ubuntu-latest

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

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: '3.x'

	- name: Install depenencies
	run: \|
	python -m pip install --upgrade pip
	pip install flake8

	- name: Run flake8
	run: \|
	flake8 audio_visualizer tests

Provide feedback