优化第一阶段

lib/keyboard.js

@@ -36,13 +36,15 @@ export function stopKeypress() {
   ensureRawMode(false);
 }
 
-export function waitForKey(message = "按任意键返回...") {
+export function waitForKey(message = "按任意键返回...", predicate = () => true) {
   return new Promise(resolve => {
     console.log("\n" + message);
     initKeypress();
-    onKey(() => {
+    onKey((str, key) => {
+      const pressed = key || {};
+      if (!predicate(pressed)) return;
       stopKeypress();
-      resolve();
+      resolve(pressed);
     });
   });
 }