Using "is" as a class name is deprecated since 8.6

PHP version: 8.6.0 (master build)

Description

Loading src/Is.php emits a deprecation notice in PHP 8.6:

Deprecated: Using "is" as a class name is deprecated since 8.6 in promises/src/Is.php on line 7

How to reproduce

php src/Is.php

Possible Solution

Rename the class.

Additional context