Downgrade saml2-lib #136

Job	Run time
PHP-Linter (8.1) / linter	14s
Linter / json-linter	31s
Linter / yaml-linter	4s
PHP-Linter (8.3) / linter	13s
PHP-Linter (8.4) / linter	13s
PHP-Linter (8.2) / linter	9s
Linter / style-linter	0s
Linter / ecmascript-linter	-1s
Unit tests, PHP 8.3, ubuntu-latest	21s
Unit tests, PHP 8.1, ubuntu-latest	17s
Unit tests, PHP 8.1, windows-latest	48s
Unit tests, PHP 8.4, ubuntu-latest	21s
Unit tests, PHP 8.3, windows-latest	46s
Unit tests, PHP 8.2, windows-latest	48s
Unit tests, PHP 8.2, ubuntu-latest	20s
Unit tests, PHP 8.4, windows-latest	50s
Quality control	41s
Code coverage	11s
Security checks	19s
Cleanup artifacts	5s
	7m 10s

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