update(cookie): set method with a third parameter (#9519)

Added to the ‘set’ method a third parameter which is daysToExpiry,
which represent the expiration on the cookie in days

angular-local-storage/angular-local-storage.d.ts

@@ -56,6 +56,15 @@ declare namespace angular.local.storage {
      * @param val
      */
     set(key:string, val:string):boolean;
+    /**
+     * Directly adds a value to cookies with an expiration.
+     * Note: Typically used as a fallback if local storage is not supported.
+     * Returns: Boolean
+     * @param key
+     * @param val
+     * @param daysToExpiry
+     */
+    set(key:string, val:string, daysToExpiry:number):boolean;
     /**
      * Directly get a value from a cookie.
      * Returns: value from local storage