add updated ts_helpers to project-template

Author: petekanev

build-artifacts/project-template-gradle/src/main/assets/internal/ts_helpers.js

@@ -90,6 +90,7 @@
 
 		__extends_ts(Child, Parent);
 
+		
 		if (Parent.extend)	{
 			Child.__isPrototypeImplementationObject = true;
 			Child.__proto__ = Parent;
@@ -105,9 +106,19 @@
 	    	return extended;
 	    };
 	}
+
+	function Interfaces(interfacesArr) {
+	    return function (target) {
+            if(interfacesArr instanceof Array) {
+                // attach interfaces: [] to the object
+                target.prototype.interfaces = interfacesArr;
+            }
+	    }
+	}
 
 	global.__native = __native;
 	global.__extends = __extends;
 	global.__decorate = __decorate;
 	global.JavaProxy = JavaProxy;
+	global.Interfaces = Interfaces;
 })()