[#7|fix] Fix wrapper behaviour

As to #7, current implementation of wrapper function
can break code, which relies on value, returned by wrapepd
function. This commit fixes reported issue by making
wrapper function to return result of applying the original
function.

Changed description in both en/README.md and ru/README.md

Author: anxolerd

interfaceWrapper/en/README.md

@@ -68,7 +68,7 @@ example:
       Array.prototype.push.apply(args, arguments);
       console.log('Call: ' + fnName);
       console.dir(args);
-      fn.apply(undefined, args);
+      return fn.apply(undefined, args);
     }
   }
   ```

interfaceWrapper/ru/README.md

@@ -67,7 +67,7 @@
       Array.prototype.push.apply(args, arguments);
       console.log('Call: ' + fnName);
       console.dir(args);
-      fn.apply(undefined, args);
+      return fn.apply(undefined, args);
     }
   }
   ```