1.18.1 - fix description pattern in title (#3179)

* bump version
* add comment to customer/project/activity entity and collections api 
* improve title pattern usage

src/Constants.php

@@ -17,11 +17,11 @@ class Constants
     /**
      * The current release version
      */
-    public const VERSION = '1.18';
+    public const VERSION = '1.18.1';
     /**
      * The current release: major * 10000 + minor * 100 + patch
      */
-    public const VERSION_ID = 11800;
+    public const VERSION_ID = 11801;
     /**
      * The current release status, either "stable" or "dev"
      */