Update README.txt

Changes to this file so it complies with the new version number, this should now complete the acceptance criteria:

* Need to update /crowdhandler.php with new version number at line 19 and 42
* Check /readme.txt to see if instructions for installation and configuration need updating in line with your changes
* Need to update the /readme.txt with a version number at line 5 
* Need to add changelog to bottom of /readme.txt

Author: jonhickman

README.txt

@@ -2,7 +2,7 @@
 Contributors: rickmutt
 Tags: waiting room, traffic management, queue management, ecommerce, CrowdHandler, 
 Tested up to: 5.8
-Stable tag: 1.1.2
+Stable tag: 1.1.3
 License: GPLv2 or later
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -90,7 +90,9 @@ You can uninstall the plugin at any time to remove CrowdHandler from your site.
 
 
 == Changelog ==
-
+= 1.1.3 =
+* Updated readme.txt.
+* Updated version numbers.
 = 1.1.2 =
 * Updated readme.txt.
 * Updated test up to value.