fix: Return page width and height from document #617

Job	Run time
PHPUnit Composer v2 (PHP 7.4)	28s
Tests alternative autoloader (PHP 7.1)	9s
Tests alternative autoloader (PHP 7.2)	15s
PHPUnit (PHP 7.2)	29s
Tests alternative autoloader (PHP 7.3)	14s
PHPUnit (PHP 7.3)	1m 25s
PHPUnit coverage (PHP 7.4)	1m 7s
PHPUnit (PHP 7.1)	36s
Tests alternative autoloader (PHP 7.4)	7s
PHPUnit (PHP 7.4)	32s
Tests alternative autoloader (PHP 8.0)	6s
PHPUnit (PHP 8.0)	26s
PHPUnit lowest deps (PHP 7.3)	34s
Tests alternative autoloader (PHP 8.1)	13s
PHPUnit (PHP 8.1)	36s
Tests alternative autoloader (PHP 8.2)	5s
Windows-Tests with PHP 7.1	1m 14s
PHPUnit (PHP 8.2)	27s
Tests alternative autoloader (PHP 8.3)	9s
Windows-Tests with PHP 7.2	50s
PHPUnit (PHP 8.3)	44s
Windows-Tests with PHP 7.3	56s
Windows-Tests with PHP 7.4	48s
Windows-Tests with PHP 8.0	48s
Windows-Tests with PHP 8.1	50s
Windows-Tests with PHP 8.2	1m 2s
Windows-Tests with PHP 8.3	55s
	16m 5s

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