Error generating code when using EXCEPT

[capnspacehook]

Tried to generate a simple statement using EXCEPT and received an error:

# package database
error generating code: template: table:252:79: executing "queryCode" at <.Ret.Type>: error calling Type: no type for GoQueryValue:

Reproducible here: https://play.sqlc.dev/p/e534fb7d1488233f3984e8e488530aaeeea5ba692e423aee2a0b35d959c1b56c

[kyleconroy]

Fixed in #896