fix copyright date for 2019
diff --git a/test/run_tests.h b/test/run_tests.h
index 91d6c65..ae1b9d7 100644
--- a/test/run_tests.h
+++ b/test/run_tests.h
@@ -4,7 +4,7 @@
 
  Created 9/30/18.
 
- Copyright (c) 2018, Laurence Lundblade.
+ Copyright (c) 2018-2019, Laurence Lundblade.
  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without