Added a necessary exporting to rison

types/rison/index.d.ts

@@ -2,7 +2,8 @@
 // Project: https://github.com/Nanonid/rison
 // Definitions by: Andrei Kurosh <https://github.com/impworks>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
-
+export = rison;
+export as namespace rison;
 declare var rison: IRison;
 
 interface IRison {
@@ -54,4 +55,4 @@ interface IRison {
      * @returns {} Resulting array.
      */
     decode_array<T>(encoded: string): T[];
-}
+}