update version number

Author: leoding86

package.json

@@ -1,6 +1,6 @@
 {
   "name": "pixiv-toolkits",
-  "version": "6.4.0",
+  "version": "6.4.1",
   "description": "A web extension for adding features on Pixiv and more",
   "author": "leoding86 <leoding86@msn.com>",
   "private": false,

src/background/updates/update6_0_0.js

@@ -15,7 +15,7 @@ import defaultSettings from "@/config/default";
 export default async () => {
   let settings = await app().getService('setting').getSettings();
   let updateSettings = Object.assign({}, defaultSettings, settings, {
-    version: '6.4.0',
+    version: '6.4.1',
   });
 
   /**