Fix KeyError: 'journeys'

[Lucas-C]

I also had to patch some dependencies versions in order to install locomotive without raising errors:

pip install markupsafe==2.0.1 'regex<2022.3.15'

This PR won't fix the root issue that prevents locomotive from working, which is that the API return this error:

{"code": "UPE-0001", "label": "error.client.incompatible.api", 'error': 'INCOMPATIBLE_CLIENT'}