Get glib, gtk+, harfbuzz and pango working on Darwin
Merge pull request #2532 from jwiegley/gtk

Get glib, gtk+, harfbuzz and pango working on Darwin
haskell-pretty-show: update to version 1.6.7

... and drop obsolete 1.2 version.
haskell-amqp: update to version 0.8.3
haskell-conduit: update to version 1.1.3
haskell-directory-tree: update to version 0.12.0
haskell-esqueleto: update to version 1.4.1.2
haskell-fay: update to version 0.20.0.4
haskell-file-embed: update to version 0.0.7
haskell-http-client: update to version 0.3.3
haskell-httpd-shed: update to version 0.4.0.2
haskell-io-streams: update to version 1.1.4.4
haskell-openssl-streams: update to version 1.1.0.1
haskell-optparse-applicative: update to version 0.9.0
haskell-pipes-aeson: update to version 0.4
haskell-pipes-parse: update to version 3.0.2
haskell-shelly: update to version 1.5.3.2
haskell-streaming-commons: update to version 0.1.3
haskell-transformers-compat: update to version 0.3.3
haskell-vty-ui: update to version 1.7