Update copyright years

Author: oschwald

docs/conf.py

@@ -51,7 +51,7 @@
 
 # General information about the project.
 project = 'maxminddb'
-copyright = '2014, MaxMind, Inc.'
+copyright = '2013-2018, MaxMind, Inc.'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the

maxminddb/__init__.py

@@ -51,4 +51,4 @@ def Reader(database):  # pylint: disable=invalid-name
 __version__ = '1.3.0'
 __author__ = 'Gregory Oschwald'
 __license__ = 'Apache License, Version 2.0'
-__copyright__ = 'Copyright 2014 Maxmind, Inc.'
+__copyright__ = 'Copyright 2013-2018 Maxmind, Inc.'