Change version to 1.7.3
diff --git a/rpc_util.go b/rpc_util.go
index 2c748fb..5d10143 100644
--- a/rpc_util.go
+++ b/rpc_util.go
@@ -567,6 +567,6 @@
 const SupportPackageIsVersion4 = true
 
 // Version is the current grpc version.
-const Version = "1.7.3-dev"
+const Version = "1.7.3"
 
 const grpcUA = "grpc-go/" + Version