set numpy version in gh workflow #700

	name: pytest

	on: [push]

	jobs:
	unit-tests:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.9]

	steps:
	- name: Checkout
	uses: actions/checkout@v3

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	python -m pip cache purge
	python -m pip install --upgrade pip
	python -m pip install -r requirements.txt

	- name: Build Cython extensions
	run: python setup.py build_ext --inplace

	- name: Automated tests
	run: python -m pytest

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