Only enable TypeInType on pre-8.6 GHCs

After GHC 8.6, `TypeInType`'s functionality was made a part of the `DataKinds`
and `PolyKinds` extensions. Moreover, GHC 9.6 gives a deprecation warning when
using `TypeInType`, so we now have an extra incentive to only enable
`TypeInType` where absolutely necessary.

base-compat/src/Control/Exception/Compat.hs

@@ -3,9 +3,13 @@
 {-# LANGUAGE Trustworthy #-}
 #endif
 #if MIN_VERSION_base(4,10,0)
+{-# LANGUAGE DataKinds #-}
 {-# LANGUAGE MagicHash #-}
+{-# LANGUAGE PolyKinds #-}
 {-# LANGUAGE RankNTypes #-}
+# if __GLASGOW_HASKELL__ < 806
 {-# LANGUAGE TypeInType #-}
+# endif
 #endif
 module Control.Exception.Compat (
   module Base