Change minimum PHP requirements to support non-deprecated versions#239

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nbish11 wants to merge 14 commits intoLevel-2:masterfrom

nbish11:use-supported-php-versions

Commits on Jun 6, 2022

Remove hacks from test cases, incorrect behaviour has been remedied in method
nbish11
committed
Restore microsecond behaviour in time differences similar, to before PHP 7.1
nbish11
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Provide PHP requirements section and add attribution
nbish11
committed