net-mail/mailbox-count: new version 0.0.4.

net-mail/mailbox-count: new version 0.0.4.

Another attempt to fix the semigroups mess. The semigroups package is
supposed to offer a backwards-compatible API, but deleted their whole
source tree in the minor release 0.18.2. And since the build system
restricts package visibility to only things you've declared, we need
to hack together a double-conditional both in the cabal build system
and in the ebuild, to require old-enough semigroups with old-enough
ghc, or alternately just a new enough GHC.

Bug: https://bugs.gentoo.org/707836
Package-Manager: Portage-2.3.84, Repoman-2.3.20
Signed-off-by: Michael Orlitzky <mjo@gentoo.org>