Update changelog and version for 4.21

Author: mecha

CHANGELOG.md

@@ -4,6 +4,16 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [4.21] - 2022-07-13
+### Change
+* Updated Twig to v1.42.2, to support PHP 8 or later.
+* Optimized feed item date processing when an item is being imported.
+* Permalink and GUID checks are now done across all feed sources when an item is being imported.
+
+### Fixed
+* Various PHP 8 errors and deprecations compatibility.
+* The classic editor button was generating incorrect shortcodes.
+
 ## [4.20] - 2022-01-18
 ### Added
 * New option to use feed item GUIDs instead of permalinks to detect duplicate items.

wp-rss-aggregator.php

@@ -4,7 +4,7 @@
  * Plugin Name: WP RSS Aggregator
  * Plugin URI: https://www.wprssaggregator.com/#utm_source=wpadmin&utm_medium=plugin&utm_campaign=wpraplugin
  * Description: Imports and aggregates multiple RSS Feeds.
- * Version: 4.20
+ * Version: 4.21
  * Author: RebelCode
  * Author URI: https://www.wprssaggregator.com
  * Text Domain: wprss
@@ -76,7 +76,7 @@
 
 // Set the version number of the plugin.
 if( !defined( 'WPRSS_VERSION' ) )
-    define( 'WPRSS_VERSION', '4.20' );
+    define( 'WPRSS_VERSION', '4.21' );
 
 if( !defined( 'WPRSS_WP_MIN_VERSION' ) )
     define( 'WPRSS_WP_MIN_VERSION', '4.8' );