Allow base-4.21

Author: Bodigrim

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ubuntu-24.04, macOS-latest]
-        ghc: ['9.10', '9.8', '9.6', '9.4', '9.2', '9.0', '8.10', '8.8', '8.6']
+        ghc: ['9.12', '9.10', '9.8', '9.6', '9.4', '9.2', '9.0', '8.10', '8.8', '8.6']
         exclude:
           - os: macos-latest
             ghc: '9.0'

unix.cabal

@@ -11,7 +11,10 @@ bug-reports:    https://github.com/haskell/unix/issues
 synopsis:       POSIX functionality
 category:       System
 build-type:     Configure
-tested-with:    GHC==9.6.2,
+tested-with:    GHC==9.12.1,
+                GHC==9.10.1,
+                GHC==9.8.4,
+                GHC==9.6.6,
                 GHC==9.4.7,
                 GHC==9.2.8,
                 GHC==9.0.2,
@@ -74,7 +77,7 @@ library
         buildable: False
 
     build-depends:
-        base        >= 4.12.0.0  && < 4.21,
+        base        >= 4.12.0.0  && < 4.22,
         bytestring  >= 0.9.2     && < 0.13,
         time        >= 1.9.1     && < 1.15