Update year in license files
In last year's update (D48219) it was suggested that the release manager
might want to do this, so here we go.
diff --git a/LICENSE.TXT b/LICENSE.TXT
index a4bff33..478b5bf 100644
@@ -15,7 +15,7 @@
University of Illinois/NCSA
Open Source License
-Copyright (c) 2007-2018 University of Illinois at Urbana-Champaign.
+Copyright (c) 2007-2019 University of Illinois at Urbana-Champaign.
All rights reserved.