QmlDesigner: Enabling support for Qt Quick 2.5

Change-Id: I13fde57a500af3aa7e94a9e30d29b481fbc21191
Reviewed-by: Robert Loehning <robert.loehning@theqtcompany.com>

src/plugins/qmldesigner/designercore/model/texttomodelmerger.cpp

@@ -68,7 +68,7 @@ static inline QStringList supportedVersionsList()
     QStringList list;
     list << QStringLiteral("2.0") << QStringLiteral("2.1")
          << QStringLiteral("2.2") << QStringLiteral("2.3")
-         << QStringLiteral("2.4");
+         << QStringLiteral("2.4") << QStringLiteral("2.5");
     return list;
 }