Release api_core 1.5.2 (#6471)

* Release 1.5.2

Author: crwilcox

CHANGELOG.md

@@ -4,6 +4,19 @@
 
 [1]: https://pypi.org/project/google-api-core/#history
 
+## 1.5.2
+
+11-09-2018 14:22 PST
+
+
+### Implementation Changes
+- Retry transient errors in 'PollingFuture.result'. ([#6305](https://github.com/googleapis/google-cloud-python/pull/6305))
+
+### Dependencies
+- Remove hyphen from named extra in api_core. ([#6468](https://github.com/googleapis/google-cloud-python/pull/6468))
+- Bump minimum 'api_core' version for all GAPIC libs to 1.4.1. ([#6391](https://github.com/googleapis/google-cloud-python/pull/6391))
+- Avoid broken 'google-common-apis 1.5.4' release. ([#6355](https://github.com/googleapis/google-cloud-python/pull/6355))
+
 ## 1.5.1
 
 10-29-2018 13:29 PDT

setup.py

@@ -22,7 +22,7 @@
 
 name = 'google-api-core'
 description = 'Google API client core library'
-version = '1.5.1'
+version = '1.5.2'
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'
@@ -40,7 +40,8 @@
 ]
 extras = {
     'grpc': 'grpcio >= 1.8.2',
-    'grpcgcp': 'grpcio-gcp >= 0.2.2'
+    'grpcgcp': 'grpcio-gcp >= 0.2.2',
+    'grpcio-gcp': 'grpcio-gcp >= 0.2.2'
 }