Add go mod

Frederick-S · Frederick-S · commit 4ec1d6134cc0 · 2019-04-23T08:25:14.000+08:00
diff --git a/go.mod b/go.mod
@@ -0,0 +1,3 @@
+module github.com/read-and-code/cache
+
+go 1.12

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+module github.com/read-and-code/cache`
	`2`	`+`
	`3`	`+go 1.12`