Added GHA workflow to replace AppVeyor (#259) #6

	name: 'PyCyphal application builder'

	# Builds OpenCyphal PyCyphal release

	on:
	push:
	branches:
	- main
	- issue-259

	# Ensures that only one workflow is running at a time
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	#
	# PyCyphal test
	#
	pycyphal-test:
	name: Test PyCyphal
	if: startsWith(github.ref, 'refs/heads/')
	strategy:
	matrix:
	os: [ubuntu-20.04]
	python: ['3.7', '3.8', '3.9', '3.10']
	runs-on: ${{ matrix.os }}
	steps:
	- name: Checking out
	uses: actions/checkout@v3

	- name: Installing Python3
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python }}

	- name: Installing dependencies
	run: \|
	sudo apt-get install -y linux-*-extra-$(uname -r) graphviz ncat
	git submodule update --init --recursive
	python -m pip install --upgrade pip setuptools nox

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