fix: 🐛 deck could exit while rendering

When press a "q" button for exit the deck while some animation is still
in process, it closes the deck, return the shell, but still rendering
the deck. This behaviour is fixed in this commit. Now, you can not exit
the deck if it still rendering.

packages/kittik-deck/src/Deck.ts

@@ -112,6 +112,8 @@ export class Deck extends EventEmitter {
 
   // eslint-disable-next-line class-methods-use-this
   public exit (): void {
+    if (this.isRendering) return;
+
     process.stdin.pause();
     process.stdin.removeAllListeners();