distinguish QByteArray from string

there was a type safety issue during development.

src/kwin.d.ts

@@ -76,12 +76,12 @@ declare namespace KWin {
         /* read-only */
         readonly activities: string[]; /* Not exactly `Array` */
         readonly dialog: boolean;
-        readonly resourceClass: string;
-        readonly resourceName: string;
+        readonly resourceClass: QByteArray;
+        readonly resourceName: QByteArray;
         readonly screen: number;
         readonly splash: boolean;
         readonly utility: boolean;
-        readonly windowRole: string;
+        readonly windowRole: QByteArray;
 
         readonly clientPos: QPoint;
         readonly clientSize: QSize;

src/qt.d.ts

@@ -18,6 +18,11 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 // DEALINGS IN THE SOFTWARE.
 
+
+interface QByteArray {
+    /* keep it empty for now */
+}
+
 interface QRect extends IRect {
 }