Add a script to bump the version

[jtpio]

References

So we can have a single command to bump the version of both the Python packages and the npm packages.

Instead of doing it manually. This way it will also be possible to use the releaser (#805).

Code changes

Add a new script to bump the version.

TODO

• Add a script to bump the Python and JS versions
• Bump Python version with bump2version
• Align the @voial-dashboards/voila version of the JS frontend with the Python version
• Update RELEASE.md with the version bump process (build, patch, major, minor)

User-facing changes

None

Backwards-incompatible changes

None

[github-actions]

👈 Try it on binder (branch jtpio/voila/bump-version)

[jtpio]

The "Check Release" check looking on CI:

[jtpio]

We should also be able to use this script to bump the versions for the next manual release.

[jtpio]

For now this package is still private, but will probably be released too when #846 lands

[jtpio]

We might want to iterate further on the script, but for now it should be good to go.