Performance/TaxonomyMetaInOptions: add support for handling PHP 8.0+ … #377

Job	Run time
QTest: PHP latest - PHPCS lowest	17s
QTest + Lint: PHP 5.4 - PHPCS stable	1m 2s
QTest + Lint: PHP latest - PHPCS stable	20s
QTest: PHP 5.4 - PHPCS lowest	1m 16s
	2m 55s

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