Notify breaking changes on bump diff more explicitly

This new release mostly includes a small bugfix on the GitHub automated diff comments on PRs.

🐛 Bug fix

• The bot comment on pull requests warning about the diff of your API will now be more explicit in case of breaking changes (🚨).

🆙 Upgrades

• There were a few libraries upgrades since last release thanks to @dependabot
• Minimal node version supported by the action is now v12

✨