Update dependency phpunit/phpunit to v10.3.1

This MR contains the following updates:

Package	Type	Update	Change
phpunit/phpunit (source)	require-dev	minor	10.2.6 -> 10.3.1

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Release Notes

sebastianbergmann/phpunit (phpunit/phpunit)

v10.3.1

Compare Source

v10.3.0

Compare Source

v10.2.7

Compare Source

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