Merge pull request #171 from psobhanlo/master

readme - update new method for get getEndDayOfYear && getFirstDayOfMonth

Merge pull request #157 from majidalaeinia/master

Add New Methods: `subDay`, `getLastWeek`, `addDay`, `getLastMonth`

Merge pull request #149 from morilog/dev

Dev

Merge pull request #143 from hasanmonfared/master

Fix warning Implicit conversion from float to int loses in PHP 8.1

Merge pull request #114 from mohsen-hsh74/patch-1

Add PHP 8.0

Merge pull request #93 from reza-akbari/master

fix number of days in last month of leap year

Change min-stablity to dev

Add support for carbon version > 2

Add new test for issue #66

Fix issue #50 - addMonths method