Follows the templates for krunner, plasma & ktexteditor, which also have been moved from kapptemplate to the frameworks sources.

Big plan is to have all templates moved from kapptemplate to the respective sources, and at the end of the day turn kapptemplate into a framework lib (and some util apps), which then allows kdevelop, kate & co. to share the from-template-generation code. And each library/framework would provide and maintain their own templates together with the sources.

I have simply kept the min versions as used with the original templates in kapptemplate.

Motivation has been:
people who use the templates from their current latest kdepim installation still might want to create plugins and share them resp. co-develop which others who have some older kdepim around.

And the code created from the templates themselves does not require latest kdepim.

Does that make sense? Or do you want some certain more recent version as default?

5.3.0 for sure perhaps kdepim 5.0 compiles against but not sure that other kdepim version build against it.
And all distro provides qt5.6.0 but default so 5.3.0 seems too old for a template for sure.

In D8537#161234, @mlaurent wrote:

5.3.0 for sure perhaps kdepim 5.0 compiles against but not sure that other kdepim version build against it.
And all distro provides qt5.6.0 but default so 5.3.0 seems too old for a template for sure.

I have seen some still looking at ubuntu 16.04 lts, where Qt is 5.5 without further ppas. But as you prefer, you know resp. define your target developer audience :)