updated omero-py version

[erickmartins]

Description

Simple omero-py update to 5.18.0 (current latest). No tests break, no other change.

Checklist

• Docstrings for all functions
• Unit tests
• Clean style in the spirit of PEP8

For reviewers

• Check that the PR title is short, concise, and will make sense 1 year later.
• Check that new functions are imported in corresponding __init__.py.