minor #15

	name: torch backend

	on:
	- push
	- pull_request

	jobs:
	test:
	runs-on: ${{ matrix.os }}
	env:
	PYTREECLASS_BACKEND: numpy
	strategy:
	matrix:
	os: [ubuntu-latest]
	python-version: ["3.9", "3.10", "3.11"]

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install optree torch numpy
	python -m pip install typing-extensions
	python -m pip install pytest pytest-benchmark wheel coverage
	- name: Pytest Check
	run: \|
	export PYTREECLASS_BACKEND=torch
	python -m pip install .

	coverage run -m pytest tests

	- name: Codecov
	uses: codecov/[email protected]

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