Port KRun to OpenUrlJob
Bump min. required KF5 version to 5.71, as that's where OpenUrl job first appeared; also bump min. required Qt version to 5.12 (as that's what KF require currently).
Drive-by change: use range-for.
Bump min. required KF5 version to 5.71, as that's where OpenUrl job first appeared; also bump min. required Qt version to 5.12 (as that's what KF require currently).
Drive-by change: use range-for.