Log Message:
Update to case-insensitive-1.2.1.0

1.2.1.0
* Add traverse

1.2.0.11
* Dropped upper version bounds of dependencies because it's to much
  work to maintain.

1.2.0.10
* Support criterion-1.2

1.2.0.9
* Support base-4.10

1.2.0.8
* Support HUnit-1.5.

1.2.0.7
* Fix build of benchmarks when getting the sources from Hackage.

1.2.0.6
* Add Travis CI support
* Add Semigroup s => Semigroup (CI s) instance

1.2.0.5
* Support HUnit-1.3
* Support criterion-1.1
* Updated .nix files

1.2.0.4
* Fixed #17: https://github.com/basvandijk/case-insensitive/issues/17

1.2.0.3
* Add CHANGELOG to extra-source files so that it shows up on Hackage

1.2.0.2
* Bump base and deepseq upper bounds for GHC 7.10 compatibility
* Add case-insensitive.nix and default.nix
* Fix #14: Build failure with GHC 7.2.2
* Fix #8: Don't unnecessarily use NoImplicitPrelude