Add OnlineStatus.UNKNOWN

mirai-core-timpc/src/commonMain/kotlin/net.mamoe.mirai.timpc/network/packet/event/FriendOnlineStatusChanged.kt

@@ -23,7 +23,7 @@ internal object FriendOnlineStatusChangedPacket : SessionPacketFactory<FriendSta
         discardExact(8)
         val statusId = readUByte()
 
-        val status = OnlineStatus.ofId(statusId.toInt())
+        val status = OnlineStatus.ofIdOrNull(statusId.toInt()) ?: OnlineStatus.UNKNOWN
         return FriendStatusChanged(handler.bot.getQQ(qq), status)
     }
 

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/data/OnlineStatus.kt

@@ -35,7 +35,12 @@ enum class OnlineStatus(val id: Int) {
     /**
      * 离线但接收消息
      */
-    RECEIVE_OFFLINE_MESSAGE(95);
+    RECEIVE_OFFLINE_MESSAGE(95),
+
+    /**
+     * 解析错误等
+     */
+    UNKNOWN(-1);
 
     companion object {
         fun ofId(id: Int): OnlineStatus = values().first { it.id == id }