Use `PATHINFO_BASENAME` for interoperability #82

Job	Run time
lint-php (7.2) / lint-php	15s
lint-php (7.4) / lint-php	10s
lint-php (7.3) / lint-php	16s
lint-php (8.0) / lint-php	13s
lint-php (8.1) / lint-php	8s
lint-php (8.2) / lint-php	14s
coding-standards-analysis-php / coding-standards-php	18s
static-analysis-php / static-analysis-php	16s
	1m 50s

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