v0.5.0

• Added YearMonth.first_day and YearMonth.last_day properties to get the first and last day of the month.

v0.4.0

• YearMonth.current() now accepts a tz argument to specify the timezone.
• Made YearMonth instances immutable.

v0.3.1

• Use __slots__ to optimize memory usage.

v0.3.0

Added

• Added YearMonth.distance_to() method for calculating the distance between two YearMonth instances.

v0.2.0

• Added support for membership test operators (in and not in) for checking if a date or datetime falls within a YearMonth.
• Improved YearMonth.parse() performance.

v0.1.0

Initial release!