Update unordered-containers upper limit (#117)

Author: dpwiz

dear-imgui.cabal

@@ -266,7 +266,7 @@ library dear-imgui-generator
     , transformers
         >= 0.5.6 && < 0.6
     , unordered-containers
-        >= 0.2.11 && < 0.2.15
+        >= 0.2.11 && < 0.3
 
 executable test
   import: common, build-flags