Updating notebooks and using nbval instead of nbsmoke #75

	name: scqubits-examples testing via pytest nbval

	on: [push, workflow_dispatch, pull_request]

	jobs:
	build:

	runs-on: ubuntu-latest
	timeout-minutes: 100
	strategy:
	matrix:
	python-version: [3.7,
	3.8,
	3.9]

	steps:
	- uses: actions/checkout@v1
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install Cython
	pip install numpy
	pip install scipy
	pip install ipywidgets
	pip install -r workflow-requirements.info
	python -m pip install git+https://github.com/scqubits/scqubits.git
	- name: Test notebooks with py.test --nbval-lax
	run: \|
	pip install pytest
	pip install nbval
	py.test --nbval-lax

Provide feedback