Rename toInt to toNumber

app/Support/Units/Volume.php

@@ -19,6 +19,15 @@ class Volume extends \PhpUnitsOfMeasure\PhysicalQuantity\Volume implements Array
         return (string) round($value, 2);
     }
 
+    /**
+     * Return value in native unit as integer
+     * @return array
+     */
+    public function toNumber()
+    {
+        return $this->toArray();
+    }
+
     /**
      * For the HTTP Resource call
      */