KF 5.37 requiring Qt 5.7

[Rex Dieter]

David Faure wrote:

> According to the policy that KF5 should work with the last 3 releases of
> Qt5.x, it is time now for upcoming releases of KF5 to drop support for Qt
> 5.6.
> 
> Packagers: is that acceptable?

I'd prefer to continue to allow 5.6 awhile, to continue to allow support for 
rhel 7.

And in the meantime, will push them to rebase to something newer (5.9?) for 
the next point release.

-- Rex