Log Message:
Update to 1.2.1.1

changelog:
1.2.1.1

* Expose unpackCString#, which you should never use.

1.2.1.0

* Added Binary instances for both Text types. (If you have previously
  been using the text-binary package to get a Binary instance, it is
  now obsolete.)

1.2.0.6

* Fixed a space leak in UTF-8 decoding

1.2.0.5

* Feature parity: repeat, cycle, iterate are now implemented for lazy
  Text, and the Data instance is more complete

* Build speed: an inliner space explosion has been fixed with toCaseFold

* Bug fix: encoding Int to a Builder would infinite-loop if the
  integer-simple package was used

* Deprecation: OnEncodeError and EncodeError are deprecated, as they
  are never used

* Internals: some types that are used internally in fusion-related
  functions have moved around, been renamed, or been deleted (we don't
  bump the major version if .Internal modules change)

* Spec compliance: toCaseFold now follows the Unicode 7.0 spec
  (updated from 6.3)

1.2.0.4

* Fixed an incompatibility with base < 4.5