Migrate to ipytestsuite package

[edoardob90]

Main goal is to migrate the tutorial to use the test suite built around pytest from the standalone package ipytestsuite

• [x] Align requires-python versions
• [x] Add package to dependencies: local dev, Docker, Binder
• [ ] Add ipynbname JupyterLab extension as a dependency. This is a workaround to some of the limitations of the ipynbname package