How to repeat a sequence optionally including a newline

[jonhue]

I have a grammar that is structured like this:

    package: $ => seq($.statement_list, /(\r?\n)*/),

    statement: $ => choice(
      // ...
    ),
    statement_list: $ => seq(
      $.statement,
      repeat(seq($.newline, $.statement))
    ),

    newline: $ => /\r?\n|\r/

But when I try to parse a multiline file, say:

1
1

the parser throws an error. It appears to be interpreting this as two statement lists (even though it is just one) and then throws an error because a package can only consist of one statement list.

What is the proper way of doing this?