Add package to Stackage LTS 16

[Hazelfire]

This library has been missing from stackage since LTS 13. There's a couple of things we'll need to do to add it back to stackage:

• Get our dependency HaskellNet back on stackage
• Merge Allow newer versions of network library #24 to allow newer versions of the network library

This should help resolve #22 and #25

[qnikst]

Making HaskellNet back on stackage is in progress commercialhaskell/stackage#5792, I'll try to make it there soonish.

UPD. HaskellNet is on stackage nightly now.

[yitz-zoomin]

@Hazelfire @qnikst
Amazing that this important package is being maintained again. Thanks!

• Could you please push 0.3.4.3 to hackage?
• Looks like we're kicked out of stackage again. But once you push to hackage, we should be able to just add it back in. Together with HaskellNet of course.
  Thanks!

[Hazelfire]

I'm onto it, I just got added to the uploaders this week and am going to see if I can find some time to get this up very soon!

[qnikst]

I'll be able to re-push HaskellNet to Stackage as well. Btw what is the way to promptly learn that the package is out of nightly? Previously I remember there were an issue mentions, but not this time, so removal was a surprise for me

Update: it was my error, I've added HaskellNet under my account but forgotten to remove the constraints everywhere, so likely HaskellNet will appear on the Stackage soon.