Expand GDK's Asdf::Tool and Asdf::ToolVersion

What does this Merge Request do and why?

Expands GDK's Asdf::Tool and Asdf::ToolVersion needed to update PostgreSQL from 12 to 13.

Blocks !2574 (closed)

Merge Request checklist

• This change is backward compatible. If not, please include steps to communicate to our users.
• Tests added for new functionality. If not, please raise Issue to follow-up.
• [n/a] Documentation added/updated, if needed.
• [n/a] gdk doctor test added, if needed.
• [n/a] Add the ~highlight label if this MR should be included in the CHANGELOG.md.