Chore: Update notices to use CleverThis to represent myself.

NOTICE

-Copyright (c) 2017 - 2020
+Copyright (c) 2017 - 2020 CleverThis, Inc. and other contributors
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.

setup.py

@@ -8,7 +8,7 @@ setup(
     url='',
     license='Apache Software License',
     author='Jeffrey Phillips Freeman',
-    author_email='Jeffrey.Freeman@syncleus.com',
+    author_email='Jeffrey.Freeman@CleverThis.com',
     description='Async Gremlin-Python',
     long_description=open('README.md').read(),
     packages=['aiogremlin',