Making google-cloud-pubsub==0.30.1 release. (#4644)

* Making `google-cloud-pubsub==0.30.1` release.

* Also making `google-api-core==0.1.3` release.

* Dropping the Pub / Sub dependency on `grpcio`.

Author: dhermes

CHANGELOG.md

@@ -4,6 +4,23 @@
 
 [1]: https://pypi.org/project/google-cloud-pubsub/#history
 
+## 0.30.1
+
+### Notable Implementation Changes
+
+- Moving lock factory used in publisher client to the Batch
+  implementation (#4628).
+- Use a UUID (rather than a sentinel object) on `Future` (#4634).
+
+### Dependencies
+
+- Upgrading to `google-api-core==0.1.3` which depends on the latest
+  `grpcio==1.8.2` (#4642). This fixes #4600. For details, see related
+  gRPC [bug](https://github.com/grpc/grpc/issues/9688) and
+  [fix](https://github.com/grpc/grpc/pull/13665).
+
+PyPI: https://pypi.org/project/google-cloud-pubsub/0.30.1/
+
 ## 0.30.0
 
 ### Notable Implementation Changes

setup.py

@@ -51,16 +51,15 @@
 
 
 REQUIREMENTS = [
-    'google-api-core[grpc] >= 0.1.2, < 0.2.0dev',
-    'grpcio >= 1.8.2',
+    'google-api-core[grpc] >= 0.1.3, < 0.2.0dev',
     'google-auth >= 1.0.2, < 2.0dev',
     'grpc-google-iam-v1 >= 0.11.1, < 0.12dev',
     'psutil >= 5.2.2, < 6.0dev',
 ]
 
 setup(
     name='google-cloud-pubsub',
-    version='0.30.1.dev1',
+    version='0.30.1',
     description='Python Client for Google Cloud Pub/Sub',
     long_description=README,
     namespace_packages=[