fix(carousel): prevent intervals from being 0

Prevents individual intervals from being `0`, preventing end-users to specify instant auto-play transitions from occurring per-interval

Co-authored-by: Jimmy Jia <tesrin@gmail.com>

src/Carousel.tsx

@@ -505,7 +505,7 @@ function CarouselFunc(uncontrolledProps: CarouselProps, ref) {
 
     intervalHandleRef.current = window.setInterval(
       document.visibilityState ? nextWhenVisible : next,
-      activeChildIntervalRef.current || interval || undefined,
+      activeChildIntervalRef.current ?? interval ?? undefined,
     );
 
     return () => {