Merge pull request #796 from emacs-php/fix/when-let #482

Job	Run time
build (ubuntu-latest, 27.2, false)	45s
build (ubuntu-latest, 28.2, false)	45s
build (ubuntu-latest, 29.4, false)	1m 10s
build (macos-latest, 28.2, false)	1m 39s
build (macos-latest, 29.4, false)	2m 35s
build (windows-latest, 27.2, false)	1m 51s
build (windows-latest, 28.2, false)	3m 4s
build (windows-latest, 29.4, false)	5m 42s
build (ubuntu-latest, snapshot, true)	30s
build (macos-latest, snapshot, true)	1m 33s
build (windows-latest, snapshot, true)	3m 8s
	22m 42s

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