rounded amount for 2 digits

Author: payuru

src/Amount.php

@@ -56,7 +56,7 @@ public function arraySerialize() : array
     {
         return [
             "currency" => $this->getCurrency() ?? 'RUB',
-            "value" => $this->getValue()
+            "value" => round( $this->getValue(), 2),
         ];
     }
 }