Round detected location coordinates

the unit of location coordinates is pixel. So storing and passing them
as integers makes more sense.

Author: gruhn

src/components/QrcodeReader.vue

@@ -170,8 +170,8 @@ export default {
       const heightRatio = this.camera.displayHeight / this.camera.resolutionHeight
 
       return locationArray.map(({ x, y }) => ({
-        x: x * widthRatio,
-        y: y * heightRatio,
+        x: Math.floor(x * widthRatio),
+        y: Math.floor(y * heightRatio),
       }))
     },