🐛 Two bug fixes around overlays

• The overlay output will not output yaml anchors anymore. Cf #709 for details.
• Using $refs inside an overlay file will now work as expected during a bump deploy my-openapi.yml --overlay my-overlay.yml command. Meaning we now send external refs from the overlay file correctly during deployments. More details inin #722

🆕 New feature on overlays: they can now be applied within the diff command

• The diff command now supports --overlay flag. Aligning with the existing behavior of the bump deploy command, you can now call the bump diff command with overlays. This will apply the given overlay(s) to the previous and next versions being compared. All details in #710

Dependencies upgrade

As usual, we've updated some external JS dependencies.

Thanks again Jake for reporting most of the issues fixed by this release!

And of course, continue having fun designing APIs 😊 ✨