Release api_core v0.1.4 (#4730)

diff --git a/setup.py b/setup.py
index 422a950..469ed47 100644
--- a/setup.py
+++ b/setup.py
@@ -68,7 +68,7 @@
 
 setup(
     name='google-api-core',
-    version='0.1.4.dev1',
+    version='0.1.4',
     description='Core Google API Client Library',
     long_description=README,
     namespace_packages=['google'],