haddock 2.27.0

Only display out-of-date packages.

5 Reverse deps	Accepted versions
DocTest	>=2.8 && <2.10
haskell-docs	==2.14.* && ==2.13.* && ==2.11.*
HaTeX-meta	==2.10.*
Hs2lib	>=2.7.2
ide-backend-server	>=2.11 && <2.12