dev-haskell/alex: bump up to 3.1.3

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/happy: bump up to 1.19.2

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/hlint: bump up to 1.8.54

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>