Add author @方块君

src/main/resources/plugin.json

@@ -3,5 +3,5 @@
   "description": "Open command interface for third-party clients",
   "version": "dev-1.4.0",
   "mainClass": "com.github.jie65535.opencommand.OpenCommandPlugin",
-  "authors": ["jie65535"]
+  "authors": ["jie65535", "方块君"]
 }