Fix tests

swipe/swipe-tests.ts

@@ -1,4 +1,4 @@
 /// <reference path="swipe.d.ts" />
 
 // Creation of element
-var mySwipe = Swipe(document.getElementById('slider'));
+var mySwipe = new Swipe(document.getElementById('slider'));

swipe/swipe.d.ts

@@ -16,7 +16,7 @@ interface SwipeOptions {
 }
 
 declare class Swipe {
-    constructor(container: HTMLElement, options: SwipeOptions);
+    constructor(container: HTMLElement, options?: SwipeOptions);
     prev(): void;
     next(): void;
     getPos(): number;