[Kilpper] Port QRegExp to QRegularExpression

Authored by ahmadsamir on Mar 5 2020, 6:13 PM.

Description

[Kilpper] Port QRegExp to QRegularExpression

Test Plan:
make && ctest
klipper still seems to work

Reviewers: Plasma, davidedmundson, apol, broulik

Reviewed By: apol

Subscribers: plasma-devel

Tags: Plasma

Differential Revision: https://phabricator.kde.org/D27914