Update Themosis application version to 3.1.0.

Author: jlambe

src/Core/Application.php

@@ -39,7 +39,7 @@ class Application extends Container implements
     /**
      * Themosis framework version.
      */
-    public const THEMOSIS_VERSION = '3.0.0';
+    public const THEMOSIS_VERSION = '3.1.0';
 
     /**
      * Laravel version.