Vue.config.keyCodes now support array type value (#628)

* keyCodes now support array type

* remove trailing whitespace

Author: defcc

src/v2/api/index.md

@@ -97,7 +97,7 @@ type: api
 
 ### keyCodes
 
-- **Type:** `{ [key: string]: number }`
+- **Type:** `{ [key: string]: number | Array<number> }`
 
 - **Default:** `{}`
 
@@ -107,7 +107,8 @@ type: api
   Vue.config.keyCodes = {
     v: 86,
     f1: 112,
-    mediaPlayPause: 179
+    mediaPlayPause: 179,
+    up: [38, 87]
   }
   ```