Added new command UPGRADE for PrusaLink upgrade #7

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

	name: Python tests

	on: [push]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version:
	- "3.9"
	- "3.11"
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install system dependencies
	run: \|
	sudo apt-get update && sudo apt-get install -y libcap-dev libturbojpeg
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install git+https://github.com/prusa3d/gcode-metadata.git@master#egg=gcode_metadata
	pip install git+https://github.com/prusa3d/Prusa-Connect-SDK-Printer.git@master#egg=prusa.connect.sdk.printer
	pip install -U -r requirements.txt
	pip install -U ruff pytest pytest-doctestplus pytest-pylint pytest-mypy mock
	pip install -U types-pkg_resources
	- name: Lint with ruff
	run: \|
	ruff check .
	- name: Lint with pylit
	run: \|
	PYTHONPATH=`pwd` pytest -v --mypy --pylint --doctest-plus --doctest-rst prusa/link
	- name: Tests
	run: \|
	PYTHONPATH=`pwd` pytest -v --mypy --pylint --doctest-plus --doctest-rst tests

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