[Development] Maintainers, your action needed: Qt 5.13.0 changes files

[Jani Heikkinen]

Hi all,

Initial changes files for Qt 5.13.0 are now done, see https://codereview.qt-project.org/#/q/message:%22Add+changes+file+for+Qt+5.13.0%22,n,z

Please finalize those as soon as possible & make sure those will get approval immediately when ready.

Br,
Jani