Lower Go version requirement

rubenv · rubenv · commit da1cb182f00e · 2019-11-21T10:27:08.000+01:00
diff --git a/go.mod b/go.mod
@@ -1,6 +1,6 @@
 module github.com/rubenv/sql-migrate
 
-go 1.13
+go 1.11
 
 require (
 	github.com/denisenkom/go-mssqldb v0.0.0-20191001013358-cfbb681360f0
