fix(header): With amd build the header authorization initialization threw an error (#148)

Author: fragsalat

src/ws-header/ws-header.js

@@ -53,17 +53,17 @@ export class WSHeader extends Component {
     showAuthorization: PropTypes.bool
   };
 
-  /**
-   * @type {Authorization}
-   */
-  static authorization = new Authorization(this.storage);
-
   /**
    * Default storage instance
    * @type {AbstractStorage}
    */
   static storage = new LocalStorage('');
 
+  /**
+   * @type {Authorization}
+   */
+  static authorization = new Authorization(WSHeader.storage);
+
   /**
    * Initialize the storage
    * @param {string} type Can be either cookie or local