Parse error on empty secrets file

[isomorpheme]

In a project, I already added some placeholder secrets files that are empty, just to already add a call to vaultenv in automation but without requesting any secrets yet. But the parser chokes on that:

$ touch nothing-to-hide.secrets
$ vaultenv --secrets-file nothing-to-hide.secrets -- echo 'i am an open book'
[ERROR] nothing-to-hide.secrets:1:1:
  |
1 | <empty line>
  | ^
unexpected end of input
expecting "VERSION", newline, or path component

This might be a silly use case, but I think "actually, I don't need any secrets" should still be a valid input.