Ignore outdated minecraft

SpigotCore_Main/src/de/steamwar/core/ErrorHandler.java

@@ -141,6 +141,7 @@ public class ErrorHandler extends Handler {
         startsWith.add("Saving oversized chunk ");
         startsWith.add("Ignoring plugin channel");
         startsWith.add("Ignoring incoming plugin");
+        startsWith.add("This version of Minecraft is extremely outdated");
         ignoreStartsWith = Collections.unmodifiableList(startsWith);
 
         List<String> contains = new ArrayList<>();