Like sed
or tr
:
$ perl -pe 'tr/[a-z]/[A-Z]/' examples/authors.tsv | column -t
ROBINSON EDEN
WARING GWENDOLYN L.
BRUNNER JOHN
TOLKIEN JOHN RONALD REUEL
WALTON JO
TOEWS MIRIAM
CADIGAN PAT
LE GUIN URSULA K.
VESELKA VANESSA
WELLS MARTHA
LECKIE ANN