Files with CTEs throw errors

[juleswritescode]

Describe the bug

Files containing CTEs seem to cause panics.

A HN user reported this:

processing panicked: cannot start statement within statement at Some(Token { kind: With, text: "with", span: 0..4, token_type: ReservedKeyword })

the query was with test as (select 1 as id) select * from test;.

[kiwicopple]

Fixed?

#263