Used 'entry_points' instance from 'backports.entry_points_selectable'… #418

Job	Run time
Static Analysis	7s
Build package	4s
Build package	11s
Call ci unit tests workflow / Run tests (3.9)	1m 41s
Call ci unit tests workflow / Run tests (3.10)	1m 46s
Call ci unit tests workflow / Run tests (3.11)	1m 46s
	5m 35s

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