Support ghc 9.12

Also bump upper bound on hashable dependency.

Author: erikd

unordered-containers.cabal

@@ -59,8 +59,8 @@ library
   build-depends:
     base >= 4.10 && < 5,
     deepseq >= 1.4.3,
-    hashable >= 1.2.5 && < 1.5,
-    template-haskell < 2.22
+    hashable >= 1.2.5 && < 1.6,
+    template-haskell < 2.24
 
   default-language: Haskell2010