limit numpy version less then 2 (#3) #4

	name: Unit-tests on Linux CPU

	on:
	pull_request:
	push:
	branches:
	- nightly
	- main
	- release/*
	workflow_dispatch:

	env:
	CHANNEL: "nightly"

	jobs:
	tests:
	strategy:
	matrix:
	python_version: ["3.8", "3.9", "3.10"]
	fail-fast: false
	uses: pytorch/test-infra/.github/workflows/linux_job.yml@main
	with:
	runner: linux.12xlarge
	repository: pytorch/vision
	script: \|
	# Mark Build Directory Safe
	git config --global --add safe.directory /__w/vision/vision

	# Set up Environment Variables
	export PYTHON_VERSION="${{ matrix.python_version }}"
	export VERSION="cpu"
	export CUDATOOLKIT="cpuonly"

	# Set CHANNEL
	if [[ (${GITHUB_BASE_REF} = 'release') \|\| (${GITHUB_REF} = 'refs/heads/release') ]]; then
	export CHANNEL=test
	else
	export CHANNEL=nightly
	fi

	# Create Conda Env
	conda create -yp ci_env --quiet python="${PYTHON_VERSION}" numpy libpng jpeg scipy 'ffmpeg<4.3'
	conda activate /work/ci_env

	# Install PyTorch, Torchvision, and testing libraries
	set -ex
	conda install \
	--yes \
	-c "pytorch-${CHANNEL}" \
	-c nvidia "pytorch-${CHANNEL}"::pytorch[build="${VERSION}"] \
	"${CUDATOOLKIT}"
	python3 setup.py develop
	python3 -m pip install --progress-bar=off pytest pytest-mock 'av<10'

	# Run Tests
	python3 -m torch.utils.collect_env
	python3 -m pytest --junitxml=test-results/junit.xml --durations 20

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