Update go.mod

Rajat Goel · web-flow · commit 593c70688d3f · 2021-05-11T15:28:20.000-07:00
diff --git a/v6/go.mod b/v6/go.mod
@@ -1,6 +1,6 @@
 module github.com/dropbox/dropbox-sdk-go-unofficial/v6
 
-go 1.11
+go 1.13
 
 require (
 	golang.org/x/net v0.0.0-20201224014010-6772e930b67b
