Support `MDAnalysis.Universe` as the `frame` parameter #826

	name: Check Colab Notebook
	on:
	schedule:
	# run at 10am on every Monday
	- cron: '0 10 * * 1'
	pull_request:
	# Check all PR

	jobs:
	pull-notebook:
	runs-on: ubuntu-latest
	steps:
	# Pulls the Notebook from the Google Collab URL
	- name: wget-notebook
	uses: wei/wget@v1
	with:
	args: -O downloaded_file.ipynb 'https://docs.google.com/uc?export=download&id=1NU0gjtaHcB5Oc3NbFZiQYtctY2190hDu'
	# Pulls an example dataset from rascaline's repository
	- name: wget-dataset
	uses: wei/wget@v1
	with:
	args: -O frames.xyz 'https://raw.githubusercontent.com/Luthaf/rascaline/a7af348694d5268b05a89c4773b3f51211e3b344/docs/static/dataset.xyz'
	- name: install Python
	uses: actions/setup-python@v4
	with:
	python-version: '3.9'
	- name: install dependencies
	run: \|
	pip install wheel numpy tqdm jupyter nbconvert
	pip install ase chemiscope scikit-learn skmatter
	pip install git+https://github.com/lab-cosmo/librascal
	# Checks that the notebook can run without errors
	- name: run notebook
	run: \|
	jupyter nbconvert --to notebook --execute downloaded_file.ipynb

Provide feedback