update docs

packages/artplayer/src/index.js

@@ -163,6 +163,8 @@ export default class Artplayer extends Emitter {
                 url: '',
                 number: 60,
                 column: 10,
+                width: 0,
+                height: 0,
             },
             subtitle: {
                 url: '',

packages/artplayer/src/scheme/index.js

@@ -102,6 +102,8 @@ export default {
         url: s,
         number: n,
         column: n,
+        width: n,
+        height: n,
     },
     subtitle: {
         url: s,