Bump versions for ghc-9.6 release

cabal.project

-with-compiler: ghc-9.4
+with-compiler: ghc-9.6
 
 packages: ./
           ./haddock-api
           ./haddock-library
           ./haddock-test
 
-with-compiler: ghc-9.4
-
 allow-newer:
   ghc-paths:Cabal,
   *:base,

haddock-api/haddock-api.cabal

 cabal-version:        3.0
 name:                 haddock-api
-version:              2.27.0
+version:              2.28.0
 synopsis:             A documentation-generation tool for Haskell libraries
 description:          Haddock is a documentation-generation tool for Haskell
                       libraries
@@ -13,7 +13,7 @@ bug-reports:          https://github.com/haskell/haddock/issues
 copyright:            (c) Simon Marlow, David Waern
 category:             Documentation
 build-type:           Simple
-tested-with:          GHC==9.4.*
+tested-with:          GHC==9.6.*
 
 extra-source-files:
   CHANGES.md
@@ -44,7 +44,7 @@ library
 
   -- this package typically supports only single major versions
   build-depends: base            ^>= 4.16.0
-               , ghc             ^>= 9.4
+               , ghc             ^>= 9.6
                , ghc-paths       ^>= 0.1.0.9
                , haddock-library ^>= 1.11
                , xhtml           ^>= 3000.2.2
@@ -180,7 +180,7 @@ test-suite spec
     Haddock.Backends.Hyperlinker.Parser
     Haddock.Backends.Hyperlinker.Types
 
-  build-depends: ghc             ^>= 9.4
+  build-depends: ghc             ^>= 9.6
                , ghc-paths       ^>= 0.1.0.12
                , haddock-library ^>= 1.11
                , xhtml           ^>= 3000.2.2

haddock-library/haddock-library.cabal

@@ -39,7 +39,7 @@ common lib-defaults
   default-language: Haskell2010
 
   build-depends:
-    , base         >= 4.5     && < 4.17
+    , base         >= 4.5     && < 4.19
     , containers   ^>= 0.4.2.1 || ^>= 0.5.0.0 || ^>= 0.6.0.1
     , text         ^>= 1.2.3.0 || ^>= 2.0
     , parsec       ^>= 3.1.13.0

haddock-test/haddock-test.cabal

@@ -10,14 +10,14 @@ bug-reports:          https://github.com/haskell/haddock/issues
 copyright:            (c) Simon Marlow, David Waern
 category:             Documentation
 build-type:           Simple
-tested-with:          GHC==9.4.*
+tested-with:          GHC==9.6.*
 stability:            experimental
 
 library
   default-language: Haskell2010
   ghc-options: -Wall
   hs-source-dirs:   src
-  build-depends:    base >= 4.3 && < 4.17, bytestring, directory, process, filepath, Cabal
+  build-depends:    base >= 4.3 && < 4.19, bytestring, directory, process, filepath, Cabal
 
   exposed-modules:
     Test.Haddock

haddock.cabal

 cabal-version:        3.0
 name:                 haddock
-version:              2.27.0
+version:              2.28.0
 synopsis:             A documentation-generation tool for Haskell libraries
 description:
   This is Haddock, a tool for automatically generating documentation
@@ -35,7 +35,7 @@ bug-reports:          https://github.com/haskell/haddock/issues
 copyright:            (c) Simon Marlow, David Waern
 category:             Documentation
 build-type:           Simple
-tested-with:          GHC==9.4.*
+tested-with:          GHC==9.6.*
 
 extra-source-files:
   CHANGES.md
@@ -68,7 +68,7 @@ executable haddock
 
   -- haddock typically only supports a single GHC major version
   build-depends:
-    base ^>= 4.13.0.0 || ^>= 4.14.0.0 || ^>= 4.15.0.0 || ^>= 4.16.0.0 || ^>= 4.17.0.0 || ^>= 4.18.0.0
+    base ^>= 4.13.0.0 || ^>= 4.14.0.0 || ^>= 4.15.0.0 || ^>= 4.16.0.0 || ^>= 4.17.0.0 || ^>= 4.18.0.0 || ^>= 4.19.0.0
 
   if flag(in-ghc-tree)
     hs-source-dirs: haddock-api/src,  haddock-library/src
@@ -150,7 +150,7 @@ executable haddock
   else
     -- in order for haddock's advertised version number to have proper meaning,
     -- we pin down to a single haddock-api version.
-    build-depends:  haddock-api == 2.27.0
+    build-depends:  haddock-api == 2.28.0
 
 test-suite html-test
   type:             exitcode-stdio-1.0