Cutting 0.18.2 release.

Only change from 0.18.1 is preventing versions of
GAX / gRPC dependencies with breaking changes.

Author: dhermes

setup.py

@@ -22,18 +22,18 @@
 GRPC_EXTRAS = [
     'grpcio >= 1.0rc1',
     'google-gax >= 0.12.3',
-    'gax-google-pubsub-v1 >= 0.8.0',
-    'grpc-google-pubsub-v1 >= 0.8.0',
-    'gax-google-logging-v2 >= 0.8.0',
-    'grpc-google-logging-v2 >= 0.8.0',
+    'gax-google-pubsub-v1 >= 0.8.0, < 0.9dev',
+    'grpc-google-pubsub-v1 >= 0.8.0, < 0.9dev',
+    'gax-google-logging-v2 >= 0.8.0, < 0.9dev',
+    'grpc-google-logging-v2 >= 0.8.0, < 0.9dev',
 ]
 
 if sys.version_info[:2] == (2, 7) and 'READTHEDOCS' not in os.environ:
     REQUIREMENTS.extend(GRPC_EXTRAS)
 
 setup(
     name='gcloud',
-    version='0.18.1',
+    version='0.18.2',
     description='API Client library for Google Cloud',
     author='Google Cloud Platform',
     author_email='jjg+gcloud-python@google.com',