removed unneccesary toLowerCase() in ComandHandler.register (#184)

why was it there in the first place

arc-core/src/arc/util/CommandHandler.java

@@ -116,7 +116,7 @@ public <T> Command register(String text, String params, String description, Comm
         orderedCommands.remove(c -> c.text.equals(text));
 
         Command cmd = new Command(text, params, description, runner);
-        commands.put(text.toLowerCase(), cmd);
+        commands.put(text, cmd);
         orderedCommands.add(cmd);
         return cmd;
     }