build: update ray minimum version to 2.20.0 #155

	name: Test Mypy

	on:
	push:
	branches:
	- main
	pull_request:
	types:
	- opened
	- synchronize

	jobs:
	mypy-tests:
	name: mypy tests
	runs-on: ubuntu-22.04
	defaults:
	run:
	shell: bash
	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v5
	id: setup-python
	with:
	python-version: "3.11"

	- name: Set up nox
	run: pip install nox

	- name: Set up cache
	uses: actions/cache@v4
	id: cache
	with:
	path: .nox
	key: nox-mypy-${{ hashFiles('noxfile.py') }}

	- name: Run mypy test
	run: \|
	nox -s test_mypy

	- name: Check for clean working tree
	run: \|
	git diff --exit-code --stat HEAD

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