From head hackage commit: 1b155606132ae49c039f807249f15fa0b6a039ca
This is probably not in the form the maintainer would like, but is a
starting point.

Add Additive Rational

Fix documentation for basement.String indices

* add CI workflow for lts / nightly with program cache
* remove travis & appveyor

Make IPv4 parser safe

Update CI

replace fail by explicit exception

Mark ghcjs as not buildable

ghcjs support is broken under certain cases. According to:

https://github.com/vincenthz/haskell-pkg-guidelines/blob/master/support.md

It is not supported. See #486

Detect Word8 overflow while parsing IPv4

Migrate to new stack.yaml structure

[Fixes #523]