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`.
diff --git a/setup.py b/setup.py
index 8c8ea18..8273c46 100644
--- a/setup.py
+++ b/setup.py
@@ -68,7 +68,7 @@
 
 setup(
     name='google-api-core',
-    version='0.1.3.dev1',
+    version='0.1.3',
     description='Core Google API Client Library',
     long_description=README,
     namespace_packages=['google'],