Bump copyright years to 2019. (GH-11404)
diff --git a/LICENSE b/LICENSE
index 1afbedb..9dc010d 100644
--- a/LICENSE
+++ b/LICENSE
@@ -73,8 +73,8 @@
distribute, and otherwise use Python alone or in any derivative version,
provided, however, that PSF's License Agreement and PSF's notice of copyright,
i.e., "Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
-2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 Python Software Foundation; All
-Rights Reserved" are retained in Python alone or in any derivative version
+2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Python Software Foundation;
+All Rights Reserved" are retained in Python alone or in any derivative version
prepared by Licensee.
3. In the event Licensee prepares a derivative work that is based on