fix: change go version to 1.20

yongxinz · yongxinz · commit b27b3026ab5c · 2023-06-10T11:23:38.000+08:00
diff --git a/go.mod b/go.mod
@@ -0,0 +1,3 @@
+module github.com/yongxin/zen
+
+go 1.20

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+module github.com/yongxin/zen`
	`2`	`+`
	`3`	`+go 1.20`