Update index-state to get latest stan version and add lower bound (#3894)

Fixes: #3885

Co-authored-by: Michael Peyton Jones <me@michaelpj.com>

Author: 0rphee

cabal.project

@@ -35,7 +35,7 @@ packages:
          ./plugins/hls-refactor-plugin
          ./plugins/hls-overloaded-record-dot-plugin
 
-index-state: 2023-11-14T11:26:13Z
+index-state: 2023-12-10T23:30:17Z
 
 tests: True
 test-show-details: direct

plugins/hls-stan-plugin/hls-stan-plugin.cabal

@@ -46,7 +46,7 @@ library
     , text
     , transformers
     , unordered-containers
-    , stan
+    , stan >= 0.1.1.0
 
   default-language:   Haskell2010
   default-extensions: