update go.mod

Author: kyleconroy

go.mod

@@ -10,11 +10,9 @@ require (
 	github.com/kyleconroy/sqlc-testdata v0.0.0-20200512000015-15313bc43553
 	github.com/lfittl/pg_query_go v1.0.0
 	github.com/lib/pq v1.4.0
-	github.com/pingcap/parser v0.0.0-20200218113622-517beb2e39c2
-	github.com/pingcap/tidb v1.1.0-beta.0.20200219045929-1344d6ddd9e7
+	github.com/pingcap/parser v3.1.1+incompatible
+	github.com/pingcap/tidb v1.1.0-beta.0.20200426094148-df4c9f05c49c
 	github.com/spf13/cobra v0.0.5
-	golang.org/x/net v0.0.0-20191209160850-c0dbc17a3553 // indirect
-	golang.org/x/sys v0.0.0-20191220220014-0732a990476f // indirect
 	google.golang.org/genproto v0.0.0-20191223191004-3caeed10a8bf // indirect
 	google.golang.org/grpc v1.26.0 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20200121175148-a6ecf24a6d71