dev-haskell/txt-sushi: bump up to 0.6.0

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/progression: allow txt-sushi-0.6

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>
dev-haskell/txt-sushi: removed old

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