docs: Make copyright perpetual

tony · tony · commit e15f97713aac · 2021-02-24T17:28:32.000-06:00
diff --git a/tmuxp/__init__.py b/tmuxp/__init__.py
@@ -5,7 +5,7 @@
 tmuxp
 ~~~~~
 
-:copyright: Copyright 2013-2018 Tony Narlock.
+:copyright: Copyright 2013- Tony Narlock.
 :license: MIT, see LICENSE for details
 
 """
