ADD: Release version 6.2.1.

Author: oasisfeng

assembly/src/main/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:sharedUserId="com.oasisfeng.island"
-    android:versionCode="62000" android:versionName="6.2">
+    android:versionCode="62100" android:versionName="6.2.1">
 
     <application tools:ignore="AllowBackup,GoogleAppIndexingWarning,MissingApplicationIcon">