Merge pull request #800 from emacs-php/refactor/when-let #491

Job	Run time
build (ubuntu-latest, 27.2, false)	46s
build (ubuntu-latest, 28.2, false)	42s
build (ubuntu-latest, 29.4, false)	1m 11s
build (macos-latest, 28.2, false)	1m 40s
build (macos-latest, 29.4, false)	1m 53s
build (windows-latest, 27.2, false)	1m 48s
build (windows-latest, 28.2, false)	1m 32s
build (windows-latest, 29.4, false)	1m 12s
build (ubuntu-latest, snapshot, true)	30s
build (macos-latest, snapshot, true)	1m 32s
build (windows-latest, snapshot, true)	2m 53s
	15m 39s

Provide feedback