qbs build: Make use of version check capabilities in Depends item
qbs build: Make use of version check capabilities in Depends item

This makes for much better feedback to the user in case of an outdated
Qt version.

Change-Id: I2223ea35f618ed06a6eb2f01916c1a85cec009cc
Reviewed-by: Jake Petroules <2d627e1cecd5435752fa500bacbe05f7cc90c369@qt.io>

qt-labs/qbs,qt-labs/qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qt-labs/qbs,qtproject/qt-labs-qbs,qtproject/qt-labs-qbs,qt-labs/qbs