Bug#896573: libbibutils-dev: newer version

[Clint Adams]

Package: libbibutils-dev
Version: 4.12-5

hs-bibutils needs a libbibutils-dev that provides

BIBL_FORMAT_BIBOUT_FINALCOMMA
BIBL_FORMAT_BIBOUT_SINGLEDASH
BIBL_FORMAT_BIBOUT_WHITESPACE
BIBL_FORMAT_BIBOUT_BRACKETS
BIBL_FORMAT_BIBOUT_UPPERCASE
BIBL_FORMAT_BIBOUT_STRICTKEY
BIBL_FORMAT_MODSOUT_DROPKEY

https://buildd.debian.org/status/package.php?p=haskell-hs-bibutils&suite=sid