0.03 2026-05-31T12:04:57+02:00
 - Add check_hash_optional_keys() check.
 - Fix SYNOPSIS section in doc.
 - Rewrite to use of =head1 EXAMPLES section.
 - Update copyright years.

0.02 2025-07-15T11:54:52+02:00
 - Add check_hash_keys() check.
 - Fix output of example in doc.
 - Fix test comment for check_hash().

0.01 2025-06-20T14:54:42+02:00
 - First version.