Continuous-integration.yml: let workflow run on each push event #655

Job	Run time
Tests alternative autoloader (PHP 7.1)	10s
PHPUnit Composer v2 (PHP 7.4)	40s
Tests alternative autoloader (PHP 7.2)	8s
PHPUnit (PHP 7.2)	32s
PHPUnit coverage (PHP 7.4)	1m 5s
Tests alternative autoloader (PHP 7.3)	10s
PHPUnit (PHP 7.3)	27s
Tests alternative autoloader (PHP 7.4)	17s
PHPUnit (PHP 7.4)	34s
Tests alternative autoloader (PHP 8.0)	10s
PHPUnit lowest deps (PHP 7.3)	27s
PHPUnit (PHP 8.0)	40s
PHPUnit (PHP 7.1)	33s
PHPUnit (PHP 8.1)	27s
Tests alternative autoloader (PHP 8.1)	6s
PHPUnit (PHP 8.2)	26s
Tests alternative autoloader (PHP 8.2)	8s
Windows-Tests with PHP 7.1	1m 13s
PHPUnit (PHP 8.3)	27s
Tests alternative autoloader (PHP 8.3)	7s
Windows-Tests with PHP 7.2	58s
Windows-Tests with PHP 7.3	1m 1s
Windows-Tests with PHP 7.4	57s
Windows-Tests with PHP 8.0	1m 0s
Windows-Tests with PHP 8.1	1m 2s
Windows-Tests with PHP 8.2	1m 5s
Windows-Tests with PHP 8.3	54s
	15m 44s

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