Bump WP version tested up to version to 5.4

Author: Renatho De Carli Rosa

readme.txt

@@ -3,7 +3,7 @@ Contributors: Viper007Bond, automattic, donncha
 Donate link: https://alex.blog/2019/03/13/in-memory-of-alex-donation-link-update/
 Tags: code, sourcecode, block, php, xhtml, html, css, WordPress.com
 Requires at least: 4.2.3
-Tested up to: 5.3.2
+Tested up to: 5.4
 Stable tag: 3.5.3
 
 Easily post syntax-highlighted code to your site without having to modify the code at all. As seen on WordPress.com.
@@ -42,7 +42,7 @@ Try excluding this plugin's Javascript from any performance optimizations your s
 
 = Version 3.5.3 =
 
-* Add edit mode on double click option to settings, shortcode parameters and block editor. #126
+* Add "edit mode on double click" option to settings, shortcode parameters and block editor. #126
 * Add YAML highlighter. #129
 * Update plugin dependencies to the latest version. #132