feat: upgrade go version to 1.21 (#71)

Sn0rt · web-flow · commit df505da8995d · 2023-09-25T17:09:04.000+08:00
diff --git a/grpc-engine/go.mod b/grpc-engine/go.mod
@@ -1,6 +1,6 @@
 module github.com/api7/grpc-client-nginx-module
 
-go 1.19
+go 1.21
 
 require google.golang.org/grpc v1.55.1
 

-Original file line number
+Diff line change
@@ @@ -1,6 +1,6 @@ @@
 module github.com/api7/grpc-client-nginx-module
 -go 1.19
 +go 1.21
 require google.golang.org/grpc v1.55.1