Fix default parameters value

Author: EtienneLamoureux

src/Iterators/JsonIterator.php

@@ -17,7 +17,7 @@ class JsonIterator implements Iterator
     protected $cursorPosition;
     protected $nextCursorPosition;
 
-    public function __construct($jsonString, array $options = null)
+    public function __construct($jsonString, array $options)
     {
 	$this->jsonString = $jsonString;
 

src/JsonIteratorFactory.php

@@ -14,17 +14,17 @@
 class JsonIteratorFactory
 {
 
-    public static function buildJsonIterator($json, array $options = null)
+    public static function buildJsonIterator($json, array $options = array())
     {
 	return new JsonIterator($json, $options);
     }
 
-    public static function buildJsonFileIterator($jsonFileHandle, array $options = null)
+    public static function buildJsonFileIterator($jsonFileHandle, array $options = array())
     {
 	return new JsonFileIterator($jsonFileHandle, $options);
     }
 
-    public static function buildJsonFilesIterator($jsonFileHandles, array $options = null)
+    public static function buildJsonFilesIterator($jsonFileHandles, array $options = array())
     {
 	return new JsonFilesIterator($jsonFileHandles, $options);
     }