Single script to bump versions

[jtpio]

Currently each Python package has its own bump-version.py script:

• https://github.com/QuantStack/jupyter-suggestions/blob/main/python/jupyter_suggestions/scripts/bump-version.py
• https://github.com/QuantStack/jupyter-suggestions/blob/main/python/jupyter_suggestions_core/scripts/bump-version.py
• https://github.com/QuantStack/jupyter-suggestions/blob/main/python/jupyter_suggestions_rtc/scripts/bump-version.py

With the releaser config currently set to:

https://github.com/QuantStack/jupyter-suggestions/blob/fdd757e2e56cb3aa57ac0fa63f39675db9e0d0d2/pyproject.toml#L36-L42

As a workaround for jupyter-server/jupyter_releaser#567, maybe we could hoist the bump version script to the top-level, and update to the following command for bumping versions?

version_cmd = "python ../../scripts/bump-version.py"

[trungleduc]

For now the bump script of the main package jupyer_suggestions bumps also the JS packages and jupyter_suggestion-* version in its dependencies list, the scripts in other packages just bump the Python version.

[jtpio]

Maybe we can look into this later, if the scripts work fine at the moment.