#1140 - trying to fix the newestOnTop issue

Not 100% sure if this is how it should be done, but when I ran things
with this change (both locally and with a build and deployment) it
seemed to work.

src/core/containerObserver.ts

@@ -220,6 +220,6 @@ export function createContainerObserver(
       toasts.get(id)!.toggle = fn;
     },
     isToastActive: (id: Id) => activeToasts.some(v => v === id),
-    getSnapshot: () => (props.newestOnTop ? snapshot.reverse() : snapshot)
+    getSnapshot: () => snapshot
   };
 }

src/hooks/useToastContainer.ts

@@ -16,6 +16,10 @@ export function useToastContainer(props: ToastContainerProps) {
 
     const toRender = new Map<ToastPosition, Toast[]>();
 
+    if (props.newestOnTop) {
+      snapshot.reverse();
+    }
+
     snapshot.forEach(toast => {
       const { position } = toast.props;
       toRender.has(position) || toRender.set(position, []);