Implement rounding in sqrt() #263

Job	Run time
PHPStan	18s
Coding Standard / Coding Standard (PHP 8.2)	24s
PHPUnit (8.3, GMP, highest)	17s
PHPUnit (8.3, BCMath, highest)	37s
PHPUnit (8.2, BCMath, highest)	39s
PHPUnit (8.4, BCMath, highest)	29s
PHPUnit (8.2, BCMath, lowest)	36s
PHPUnit (8.5, GMP, highest)	21s
PHPUnit (8.2, GMP, highest)	18s
PHPUnit (8.5, Native, highest)	1m 33s
PHPUnit (8.2, Native, highest)	1m 37s
PHPUnit (8.3, Native, highest)	1m 36s
PHPUnit (8.5, BCMath, highest)	20s
PHPUnit (8.2, GMP, lowest)	19s
PHPUnit (8.2, Native, lowest)	1m 34s
PHPUnit (8.4, GMP, highest)	23s
PHPUnit (8.4, Native, highest)	2m 24s
	13m 45s

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