Bump base bound to 4.21 for GHC 9.12

buildinfo-reference-generator/buildinfo-reference-generator.cabal

@@ -8,7 +8,7 @@ executable buildinfo-reference-generator
   ghc-options:      -Wall
   main-is:          Main.hs
   build-depends:
-    , base             >=4.11 && <4.21
+    , base             >=4.11 && <4.22
     , Cabal
     , Cabal-described
     , containers

cabal-install-solver/cabal-install-solver.cabal

@@ -99,7 +99,7 @@ library
 
   build-depends:
     , array         >=0.4      && <0.6
-    , base          >=4.13     && <4.21
+    , base          >=4.13     && <4.22
     , bytestring    >=0.10.6.0 && <0.13
     , Cabal         ^>=3.15
     , Cabal-syntax  ^>=3.15
@@ -131,7 +131,7 @@ Test-Suite unit-tests
      UnitTests.Distribution.Solver.Modular.MessageUtils
 
    build-depends:
-     , base        >= 4.13  && <4.21
+     , base        >= 4.13  && <4.22
      , Cabal-syntax
      , cabal-install-solver
      , tasty       >= 1.2.3 && <1.6

cabal-install/cabal-install.cabal

@@ -52,7 +52,7 @@ common warnings
       ghc-options: -Wnoncanonical-monadfail-instances
 
 common base-dep
-    build-depends: base >=4.13 && <4.21
+    build-depends: base >=4.13 && <4.22
 
 common cabal-dep
     build-depends: Cabal ^>=3.15

cabal-testsuite/cabal-testsuite.cabal

@@ -26,7 +26,7 @@ common shared
   default-language: Haskell2010
 
   build-depends:
-    , base >= 4.11 && < 4.21
+    , base >= 4.11 && < 4.22
     -- this needs to match the in-tree lib:Cabal version
     , Cabal ^>= 3.15.0.0