Updated dependencies and fixed compatibility to ghc-7.10.1

[achirkin]

Tried to use geojson with latest ghc and ran into several compatibility issues.
Suggest these changes to make it work with GHC 7.10.1

[domdere]

Hmm that travis file looks pretty old, i'll update it to setup a proper environment

[domdere]

can you rebase please and see how the 7.10.1 travis build goes pls?

[achirkin]

Thanks for such quick response! Rebased.

[domdere]

ok, the head build passes even thought the 7.10.1 build fails... I have to look into that haskell-src-exts problem and see if its an issue with the PR or the travis environment, oes the build work for you from a clean 7.10 environment?

the 7.8 build is broken though, I have been putting off how I want to handle this, I dont really want macros all over the code. Since the code itself has been pretty stable, i am thinking of doing one final cut for 7.8 with the latest deps that will build, before doing a major point release where 7.8 support is dropped.

once i've put that out, and I know the 7.10 build issue isnt a problem with this PR, i'm happy to merge this in as it is and tweak the travis file accordingly

[achirkin]

But it should not be so bad. On 7.10.1 there is a problem of haskell-src-exts package, I will request change on this too.
In 7.10.1 Foldable toList moved into class itself, and I forgot about that. I call toList now qualified and I hope it compiles on both platforms.

[domdere]

Nice those build errors look pretty trivial

[achirkin]

Yep, now only 7.10.1 fails due to haskell-src-exts-1.16.0.1 .

[achirkin]

Oh no, my latest commit with parsing changes went here

[domdere]

ok cool thanks, ill merge this in later today and make a cut

[domdere]

sorry i took so long, ill make a cut soon

[domdere]

@achirkin Its been deployed