fix standard

lib/io.js

@@ -99,20 +99,23 @@ class IO {
     const peer = { port: rinfo.port, host: rinfo.address }
 
     switch (message.type) {
-      case TYPE.RESPONSE:
+      case TYPE.RESPONSE: {
         this._ctx.onresponse(message, peer)
         this._finish(message.rid, null, message, peer)
         break
+      }
 
-      case TYPE.QUERY:
+      case TYPE.QUERY: {
         this._ctx.onrequest(QUERY, message, peer)
         break
+      }
 
-      case TYPE.UPDATE:
+      case TYPE.UPDATE: {
         const rt = message.roundtripToken
         if (!rt || (!rt.equals(this._token(peer, 0)) && !rt.equals(this._token(peer, 1)))) return
         this._ctx.onrequest(UPDATE, message, peer)
         break
+      }
     }
   }