r_calendar 0.1.9-nullsafety

A new Flutter package about calendar,you can use this design the calendar and support single or multiple selected.

[0.1.9-nullsafety] - null safety

[0.1.8] - Fix the bugs in week select bug.

[0.1.7] - Fix the bugs in aggregate selection

[0.1.6] - add expand data in controller

[0.1.5] - format

[0.1.4] - add week view .

[0.1.3] - remove buildMonthYear 、left and right , add build top widget.

[0.1.2] - add single and multiple selected to packages.

[0.1.1] - fix listener data not change and add monthDate to controller.

[0.1.0] - release