1.1.0
- Fixed an issue where some negative dates weren't validating under level 1 or level 2.
- Modified tests to use pytest, and more specifically, parametrization. Makes it easier to identify what specific
input is the cause of any failed test. - Added continuous integration.
- Improved support for dates with "u".
- Fixed an issue where level 0 dates validated as level 1 dates.
- Support Python versions through 3.7.