[Dependabot] Update phpunit/phpunit requirement from 9.6.21 to 9.6.22… #2313

Job	Run time
Composer Validate (8.3)	8s
PHP Lint (7.3)	12s
PHP Lint (7.4)	12s
PHP Lint (8.0)	12s
PHP Lint (8.1)	7s
PHP Lint (8.2)	8s
PHP Lint (8.3)	8s
PHP Lint (8.4)	9s
Static Analysis (composer:normalize, 8.3)	37s
Unit tests (7.3, lowest)	25s
Static Analysis (php:fixer, 8.3)	25s
Unit tests (7.3, highest)	15s
Static Analysis (php:md, 8.3)	32s
Unit tests (7.4, lowest)	18s
Static Analysis (php:rector, 8.3)	25s
Unit tests (7.4, highest)	28s
Static Analysis (php:stan, 8.3)	22s
Unit tests (8.0, lowest)	25s
Unit tests (8.0, highest)	25s
Unit tests (8.1, lowest)	27s
Unit tests (8.1, highest)	23s
Unit tests (8.2, lowest)	20s
Unit tests (8.2, highest)	26s
Unit tests (8.3, lowest)	25s
Unit tests (8.3, highest)	11s
Unit tests (8.4, lowest)	24s
Unit tests (8.4, highest)	22s
	8m 51s

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