Add singularity function for maximum and minimum (#1642) #5616

Job	Run time
check-package / init-store	4s
check-schema / schema	11s
precommit-run / pre-commit	59s
check-package / pkg-build (ubuntu-latest)	17s
check-package / pkg-check (ubuntu-latest, 3.10)	2m 33s
check-package / pkg-check (ubuntu-latest, 3.11)	2m 55s
check-package / pkg-check (macOS-latest, 3.10)	1m 12s
check-package / pkg-check (macOS-latest, 3.11)	1m 16s
check-package / pkg-check (windows-latest, 3.10)	2m 49s
check-package / pkg-check (windows-latest, 3.11)	3m 30s
check-package / pkg-guardian	1s
	15m 47s

Provide feedback