Update to jupyterlab 4 #316

	name: Build

	on: [push, pull_request]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.9, "3.10", "3.11"]
	fail-fast: false
	steps:
	- uses: actions/checkout@v4
	- uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
	# https://github.com/jupyterlab/maintainer-tools/blob/main/.github/actions/base-setup/action.yml
	with:
	python_version: ${{ matrix.python-version }}
	node_version: '18.x'
	- name: Install dependencies
	run: python -m pip install -U jupyterlab~=4.0
	- name: jlpm config
	run: jlpm config set -H enableImmutableInstalls false
	- name: install ts modules
	run: jlpm
	- name: jlpm lint check
	run: jlpm run eslint:check
	- name: install python package
	run: python -m pip install .
	- name: check for widgyts in extensions
	run: \|
	jupyter server extension list 2>&1 \| grep -ie "widgyts.*OK"

	jupyter labextension list 2>&1 \| grep -ie "@yt-project/yt-widgets.*OK"
	- name: run jupyterlab browser check
	run: python -m jupyterlab.browser_check

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