root level C style comments not parsed properly (/* */)

[mmoncure]

issue: root level comments stop the parser

To Reproduce

test.sql:
/* this is a test */
select 0;

./postgrestools check test.sql
test.sql:1:1 syntax ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

✖ Invalid statement: Unable to find root node

1 │ /* this is a test */
│ ^^^^^^^^^^^^^^^^^^^^
2 │ select 0;
3 │