Change version to 1.2.10

Release 1.2.8

Release v1.2.6

Add changelog

Fix `timecop_date_create_from_format()` for supportting time

travelling / Refactoring / Add tests

Implement TimecopDateTimeImmutable::__construct(),

timecop_date_create_immutable(),
timecop_date_create_immutable_from_format()
/ Now timecop_date_create_from_format() returns DateTime instance

Release v1.2.1

Handle microseconds accurately in time traveling / Now timecop_freeze()

and timecop_travel() accepts either DateTimeInterface or int / Implement
timecop_scale() / Implement Timecop::***() as alias of timecop_***()

Fix README / Add test

Fix README