Tests

Make `SnakeCaseToCamelCaseConverter` accept `Source` #1327

Job	Run time
Backward Compatibility Check	1m 3s
PHP 8.1, highest deps	51s
PHP 8.1, lowest deps	40s
PHP 8.2, highest deps	46s
PHP 8.3, lowest deps	48s
PHP 8.2, lowest deps	35s
PHP 8.4, highest deps	32s
PHP 8.3, highest deps	34s
PHP 8.5, highest deps	41s
PHP 8.4, lowest deps	46s
	7m 16s

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