v1.2.1

• Fixed a small edge case where the separator became wrong

Thanks @rasmusbe

v1.2.0

• Added format method
• Date validation don't depend on timezone anymore

v1.1.1

• Fixed: Restore timezone after date calculations. #1

v1.1.0

• Added namespace to class.

v1.0.1

• Removed go file from project.
• Renamed to php-personnummer instead of php-is-personnummer.

v1.0.0

v1.0.0