If you're referring to the "Powered by Dancer ..." at the bottom of the pages, you're absolutely right, and it's now done this way.
We use a variable that is added by the abstract layer of templates, called "dancer_version".

Here's from the main.tt I just scaffolded:
Powered by <a href="http://perldancer.org/">Dancer</a> <% dancer_version %>

All the best,
Sawyer.