set Command to upper case

IRCTokens/Line.cs

···
 
         public Line(string command, params string[] parameters)
         {
-            Command = command;
+            Command = command.ToUpperInvariant();
             Params  = parameters.ToList();
         }
 
···
 
             if (Params.Count > 0)
             {
-                Command = Params[0].ToUpper(CultureInfo.InvariantCulture);
+                Command = Params[0].ToUpperInvariant();
                 Params.RemoveAt(0);
             }