GUACAMOLE-929: Update copyright date to 2020.
diff --git a/NOTICE b/NOTICE
index 39de3ec..c5fc0d3 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,5 +1,5 @@
 Apache Guacamole
-Copyright 2019 The Apache Software Foundation
+Copyright 2020 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).