fix: updated readme

Author: preda-bogdan

readme.md

@@ -1,9 +1,9 @@
 # Visualizer: Tables and Charts Manager for WordPress # #
 **Contributors:** [codeinwp](https://profiles.wordpress.org/codeinwp), [themeisle](https://profiles.wordpress.org/themeisle), [marius2012](https://profiles.wordpress.org/marius2012), [marius_codeinwp](https://profiles.wordpress.org/marius_codeinwp), [hardeepasrani](https://profiles.wordpress.org/hardeepasrani), [rozroz](https://profiles.wordpress.org/rozroz), [Madalin_ThemeIsle](https://profiles.wordpress.org/Madalin_ThemeIsle)  
 **Tags:** tables, charts, pie, visualization, graphs  
-**Requires at least:** 3.5  
-**Tested up to:** 5.6  
-**Requires PHP:** 5.6  
+**Requires at least:** 5.2  
+**Tested up to:** 6.5  
+**Requires PHP:** 7.4  
 **Stable tag:** trunk  
 **License:** GPL v2.0 or later  
 **License URI:** http://www.opensource.org/licenses/gpl-license.php