fix(version): Update the minimum Go version declared in go.mod to fix build failures.

Kayne666 · Kayne666 · commit be479b7acbad · 2024-08-19T15:21:38.000+08:00
diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/aliyun/aliyun-mns-go-sdk
 
-go 1.18
+go 1.20
 
 require (
 	github.com/gogap/errors v0.0.0-20210818113853-edfbba0ddea9
