qb: tuples now returns the correct names

The names are auto generated in the form param_0, param_1, ...

qb/insert_test.go

@@ -80,12 +80,12 @@ func TestInsertBuilder(t *testing.T) {
 		{
 			B: Insert("cycling.cyclist_name").TupleColumn("id", 2),
 			S: "INSERT INTO cycling.cyclist_name (id) VALUES ((?,?)) ",
-			N: []string{"id"},
+			N: []string{"id_0", "id_1"},
 		},
 		{
 			B: Insert("cycling.cyclist_name").TupleColumn("id", 2).Columns("user_uuid"),
 			S: "INSERT INTO cycling.cyclist_name (id,user_uuid) VALUES ((?,?),?) ",
-			N: []string{"id", "user_uuid"},
+			N: []string{"id_0", "id_1", "user_uuid"},
 		},
 		// Add IF NOT EXISTS
 		{