Update LICENSE

Author: mgage

LICENSE

@@ -2,7 +2,7 @@
                          Online Homework Delivery System                        
                                    Version 2.*                                 
 
-                    Copyright 2000-2017, The WeBWorK Project                    
+                    Copyright 2000-2018, The WeBWorK Project                    
                               All rights reserved.                              
 
     This program is free software; you can redistribute it and/or modify