Use `PATHINFO_BASENAME` for interoperability #81

Job	Run time
lint-php (7.2) / lint-php	14s
lint-php (7.3) / lint-php	15s
lint-php (7.4) / lint-php	13s
lint-php (8.0) / lint-php	14s
lint-php (8.1) / lint-php	12s
lint-php (8.2) / lint-php	11s
coding-standards-analysis-php / coding-standards-php	24s
static-analysis-php / static-analysis-php	23s
	2m 6s

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