PHPLIB-152: Use 1 instead of -1 for FindOne limit

Author: jmikola

src/Operation/FindOne.php

@@ -62,7 +62,7 @@ public function __construct($databaseName, $collectionName, $filter, array $opti
             $databaseName,
             $collectionName,
             $filter,
-            ['limit' => -1] + $options
+            ['limit' => 1] + $options
         );
 
         $this->options = $options;