Update years

Author: asvetlov

LICENSE

@@ -186,7 +186,7 @@ Apache License
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright {yyyy} {name of copyright owner}
+   Copyright 2015-2018 Andrew Svetlov and aio-libs team
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

docs/conf.py

@@ -71,8 +71,8 @@
 
 # General information about the project.
 project = 'aiohttp_session'
-copyright = '2015,2016 Andrew Svetlov'
-author = 'Andrew Svetlov'
+copyright = '2015-2018 Andrew Svetlov and aio-libs team'
+author = 'Andrew Svetlov and aio-libs team'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the