Relieve ios deployment version to 7.0
diff --git a/templates/gRPC-RxLibrary.podspec.template b/templates/gRPC-RxLibrary.podspec.template
index 35a06c8..48f0df8 100644
--- a/templates/gRPC-RxLibrary.podspec.template
+++ b/templates/gRPC-RxLibrary.podspec.template
@@ -50,7 +50,7 @@
       :tag => "v#{version}",
     }
 
-    s.ios.deployment_target = '7.1'
+    s.ios.deployment_target = '7.0'
     s.osx.deployment_target = '10.9'
 
     name = 'RxLibrary'