feat(multiplayer): check cato version before establishing connection.

HMCLCore/src/main/java/org/jackhuang/hmcl/game/CrashReportAnalyzer.java

@@ -1,3 +1,20 @@
+/*
+ * Hello Minecraft! Launcher
+ * Copyright (C) 2021  huangyuhui <huanghongxun2008@126.com> and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
 package org.jackhuang.hmcl.game;
 
 import org.jackhuang.hmcl.util.io.FileUtils;
@@ -162,11 +179,11 @@ public final class CrashReportAnalyzer {
         return result;
     }
 
-    public static final int getJavaVersionFromMajorVersion(int majorVersion) {
+    public static int getJavaVersionFromMajorVersion(int majorVersion) {
         if (majorVersion >= 46) {
             return majorVersion - 44;
         } else {
             return -1;
         }
     }
-}
+}