devel/floskell: Update to 0.11.0

Floskell 0.11.0 (2023-10-01)
* Fix alignment of non-ASCII identifiers
* Fix extra whitespace generated for preprocessor directives at top/bottom
  of files
* Fix runtime blow-up with large number of pattern guards
* Add support for manual formatting / hiding regions of code from the
  formatter
* Add support for multi-line preprocessor directives
* Add support for hsc2hs #enum directives
* Add support for shebang lines
* Add support for building with aeson-2.2.0.0 and
  optparse-applicative-0.18.1.0

Floskell 0.10.8 (2023-08-12)
* Add support for building with GHC-9.6.2

(pho)