Bump VERSION to 1.30.0

Diff

v1.29.0...faf7bac3

MRs

• Make Ruby 3.0.5 the default Ruby (!278 - merged)
• Update RuboCop to support Ruby 3 (!277 - merged)
• Make ruby:3.0 the default for CI (!281 - merged)
• Sleep with retrying and increase debugging arou... (!276 - merged)
• Fix branch example interval type (!279 - merged)
• Add lefthook support (!280 - merged)

Checklist

• Diff link is up-to-date.
• Check the release notes: https://gitlab.com/api/v4/projects/3430480/repository/changelog?version=1.30.0
• Based on the diff and the release notes, version.rb is updated, according to SemVer.