Fix setup.py to pull in grpc extra

Jon Wayne Parrott · Jon Wayne Parrott · commit 4da64c38dced · 2018-02-12T13:19:38.000-08:00
diff --git a/bigtable/setup.py b/bigtable/setup.py
@@ -52,7 +52,7 @@
 
 REQUIREMENTS = [
     'google-cloud-core >= 0.28.0, < 0.29dev',
-    'google-api-core >= 0.1.1, < 0.2.0dev',
+    'google-api-core[grpc] >= 0.1.1, < 0.2.0dev',
 ]
 
 setup(
