GHC 8 workaround

[ilovezfs]

To get pandoc building under GHC 8.0.1 for Homebrew (we only typically support the latest GHC), I've needed to add a "cabal.config" file at the root of the package containing "allow-newer: base,time", at which point everything builds as expected. Without this, I get

Resolving dependencies...
cabal: Could not resolve dependencies:
trying: pandoc-1.17.0.3 (user goal)
trying: base-4.9.0.0/installed-4.9... (dependency of pandoc-1.17.0.3)
next goal: haddock-library (dependency of pandoc-1.17.0.3)
rejecting: haddock-library-1.4.1 (conflict: pandoc => haddock-library>=1.1 &&
<1.3)
rejecting: haddock-library-1.2.1, haddock-library-1.2.0 (conflict:
base==4.9.0.0/installed-4.9..., haddock-library => base>=4.5 && <4.9)
rejecting: haddock-library-1.1.1 (conflict: base==4.9.0.0/installed-4.9...,
haddock-library => base>=4.3 && <4.8)
rejecting: haddock-library-1.1.0 (conflict: base==4.9.0.0/installed-4.9...,
haddock-library => base>=4.5 && <4.8)
rejecting: haddock-library-1.0.1, haddock-library-1.0.0 (conflict: pandoc =>
haddock-library>=1.1 && <1.3)
Dependency tree exhaustively searched.

[ilovezfs]

Closed via Homebrew/homebrew-core#1717