Bump tested upto 6.0

Author: PatelUtkarsh

plugin/readme.txt

@@ -1,7 +1,7 @@
 === Material Design for WordPress ===
 Contributors: google, materialdesign, xwp
 Requires at least: 5.6
-Tested up to: 5.8.2
+Tested up to: 6.0
 Stable tag: 0.6.0
 License: Apache License, Version 2.0
 License URI: https://www.apache.org/licenses/LICENSE-2.0

theme/style.css

@@ -23,7 +23,7 @@ Version: 0.6.0
 License: Apache License, Version 2.0
 License URI: https://www.apache.org/licenses/LICENSE-2.0
 Text Domain: material-design-google
-Tested up to: 5.8.1
+Tested up to: 6.0
 Requires PHP: 5.6
 Tags: blog, custom-colors, custom-logo, custom-menu, featured-images, full-width-template, one-column, threaded-comments, accessibility-ready, footer-widgets, editor-style, sticky-post, translation-ready, rtl-language-support, block-styles, wide-blocks, block-patterns, grid-layout, theme-options