Bug#1113722: debian/watch version 5

On Tue Sep 2, 2025 at 9:14 AM CEST, Marc Haber wrote:
> It would be nice if uscan would recognize both version= and Version:. 
> It currently gets confused and falls back to more ancient versions, 
> giving misleading error messages, when one accidentally starts a v5 
> file with "version=5", which is an easy mistake when editing.

So a v5 file with `version=5` instead of `Version: 5` would be valid? 
It's a bit odd, considering all other keys follow the conventional 
deb822 format. Maybe improving the error message would be an equally 
good solution.