Support sqlite aggregate functions in sqlc-gen-zombiezen

[bannatech]

When generating code, sql statements containing aggregate functions fail:

# package zz
error generating code: process: error running command panic: toGoType unhandled type 'any' for column 'max'

goroutine 1 [running]:
github.com/delaneyj/toolbelt/sqlc-gen-zombiezen/zombiezen.toGoType(0xc00025e420)
        third_party/go/sqlc_gen_zombiezen/_sqlc_gen_zombiezen_src/sqlc-gen-zombiezen/zombiezen/queries.go:134 +0x28e
github.com/delaneyj/toolbelt/sqlc-gen-zombiezen/zombiezen.generateQueries.func2(_, _)
        third_party/go/sqlc_gen_zombiezen/_sqlc_gen_zombiezen_src/sqlc-gen-zombiezen/zombiezen/queries.go:49 +0x78
github.com/samber/lo.Map[...]({0xc000078668?, 0x1, 0x7}, 0xc0001a7c98?)
        pkg/linux_amd64/github.com/samber/lo/slice.go:30 +0xe2
github.com/delaneyj/toolbelt/sqlc-gen-zombiezen/zombiezen.generateQueries(0xc0000e07e0)
        third_party/go/sqlc_gen_zombiezen/_sqlc_gen_zombiezen_src/sqlc-gen-zombiezen/zombiezen/queries.go:48 +0x345
github.com/delaneyj/toolbelt/sqlc-gen-zombiezen/zombiezen.Generate({0xc00022c000?, 0x32d4?}, 0xc0000e07e0)
        third_party/go/sqlc_gen_zombiezen/_sqlc_gen_zombiezen_src/sqlc-gen-zombiezen/zombiezen/gen.go:25 +0x1a5
main.run()
        third_party/go/sqlc_gen_zombiezen/_sqlc_gen_zombiezen_src/sqlc-gen-zombiezen/main.go:33 +0x11f
main.main()
        third_party/go/sqlc_gen_zombiezen/_sqlc_gen_zombiezen_src/sqlc-gen-zombiezen/main.go:17 +0x13

Schema:

CREATE TABLE IF NOT EXISTS test (
    id INTEGER PRIMARY KEY,
    data INTEGER NOT NULL
);

Query:

-- name: GetTest :one
SELECT
    max(data)
FROM
    test;