Add developer's info

Author: keigohtr

setup.py

@@ -48,11 +48,11 @@
     name=PACKAGE_NAME,
     version=VERSION,
     description="A Python gRPC client for Drucker.",
-    author_email="",
-    author="Drucker",
+    author_email="drucker.developers@gmail.com",
+    author="Drucker team and contributors",
     license="Apache License Version 2.0",
     url="https://github.com/drucker/drucker-client",
-    keywords=["Drucker", "Kubernetes"],
+    keywords=["Drucker", "Kubernetes", "Python client", "gRPC"],
     install_requires=REQUIRES,
     tests_require=TESTS_REQUIRES,
     extras_require=EXTRAS,