gnu: ghc-pandoc: Update to 2.0.6.
* gnu/packages/haskell.scm (ghc-pandoc): Update to 2.0.6.
[inputs]: Add ghc-aeson-pretty, ghc-cmark-gfm, ghc-doctemplates, ghc-glob,
ghc-hslua-module-text, ghc-old-locale, ghc-skylighting, and ghc-split; remove
ghc-ansi-terminal, ghc-cmark, ghc-extensible-exceptions, ghc-filemanip,
ghc-highlighting-kate, and ghc-old-time.
[native-inputs]: Remove ghc-test-framework, ghc-test-framework-hunit, and
ghc-test-framework-quickcheck2; add ghc-tasty, ghc-tasty-golden,
ghc-tasty-hunit, and ghc-tasty-quickcheck.