Log Message:
textproc/hs-shakespeare: Update to 2.0.30

2.0.30
* Add Text.Cassius.Ordered and Text.Lucius.Ordered modules with parsers to
  maintain order between attributes and mixin blocks.

2.0.29
* Support the upcoming template-haskell release with GHC 9.4 #267

2.0.28
* Add support for sub-blocks in mixins #264

2.0.27
* Change how embedded templates are located by the compiler. Relative files
  are now resolved using the Cabal project root, to fix builds of
  multi-project codebases. #266
* Change how messages are located by the compiler. The message directory is
  now resolved using the Cabal project root, to fix builds of multi-project
  codebases. #266

2.0.26
* Support @supports #263