Use microseconds property to better value extraction instead of `to…

…talMicroseconds`

src/Internal/Support/DateInterval.php

@@ -162,7 +162,7 @@ public static function toDuration(\DateInterval $i = null): ?Duration
         $d = new Duration();
         $parsed = self::parse($i);
         $d->setSeconds((int)$parsed->totalSeconds);
-        $d->setNanos(($parsed->totalMicroseconds % 1_000_000) * 1000);
+        $d->setNanos(($parsed->microseconds % 1_000_000) * 1000);
 
         return $d;
     }