fix DataStore's deprecated method implementation in PHP 8.1; Update version in changelog and composer

Author: dongnl

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Change Log
 
+## Version 5.6.1
+
+1. Fix DataStore's generator method.
+2. Fix DataStore's deprecated methods in PHP 8.1.
+
 ## Version 5.6.0
 
 1. Added: `AssetManager` ability to load resources with absolute paths.

composer.json

@@ -1,6 +1,6 @@
 {
     "name": "koolreport/core",
-    "version":"5.6.0",
+    "version":"5.6.1",
     "description": "An Open Source PHP Reporting Framework for easier and faster report delivery.",
     "keywords": ["php reporting framework","php reporting tools","data processing","data visualization","charts and graphs"],
     "homepage": "https://www.koolreport.com",

src/core/DataStore.php

@@ -1409,7 +1409,8 @@ public function columnMeta($settings)
      * 
      * @return null
      */
-    public function getIterator()
+    // #[\ReturnTypeWillChange]
+    public function getIterator(): \Traversable
     {
         return new \ArrayIterator($this->rows);
     }
@@ -1422,7 +1423,8 @@ public function getIterator()
      * 
      * @return null
      */
-    public function offsetSet($index, $row)
+    // #[\ReturnTypeWillChange]
+    public function offsetSet($index, $row): void
     {
         if (is_null($index)) {
             $this->rows[] = $row;
@@ -1438,7 +1440,8 @@ public function offsetSet($index, $row)
      * 
      * @return null
      */
-    public function offsetExists($index)
+    // #[\ReturnTypeWillChange]
+    public function offsetExists($index): bool
     {
         return isset($this->rows[$index]);
     }
@@ -1450,7 +1453,7 @@ public function offsetExists($index)
      * 
      * @return null
      */
-    public function offsetUnset($index)
+    public function offsetUnset($index): void
     {
         unset($this->rows[$index]);
     }
@@ -1462,8 +1465,10 @@ public function offsetUnset($index)
      * 
      * @return array The row data at the context
      */
+    #[\ReturnTypeWillChange]
     public function offsetGet($index)
     {
+        return null;
         return isset($this->rows[$index]) ? $this->rows[$index] : null;
     }
 }