Drop support for ghc < 9.6.

Build nightly and release candidates using ghc 9.12.

.github/workflows/ci.yml

@@ -47,18 +47,6 @@ jobs:
       matrix:
         versions:
           # NOTE: Update `CONTRIBUTING.md` when changing the minimum version
-          - ghc: '8.10'
-            cabal: 'latest'
-            cabalopts: '--ghc-option=-Werror'
-          - ghc: '9.0'
-            cabal: 'latest'
-            cabalopts: '--ghc-option=-Werror'
-          - ghc: '9.2'
-            cabal: 'latest'
-            cabalopts: '--ghc-option=-Werror'
-          - ghc: '9.4'
-            cabal: 'latest'
-            cabalopts: '--ghc-option=-Werror'
           - ghc: '9.6'
             cabal: 'latest'
             cabalopts: '--ghc-option=-Werror'
@@ -183,8 +171,8 @@ jobs:
 
     - name: Install ghc
       run: |
-        ghcup install ghc --set 9.4.4
-        ghcup install cabal --set 3.10
+        ghcup install ghc --set 9.10
+        ghcup install cabal --set latest
 
     # declare/restore cached things
 

.github/workflows/nightly.yml

@@ -17,7 +17,7 @@ jobs:
 
     - name: Install ghc
       run: |
-        ghcup install ghc --set 9.8
+        ghcup install ghc --set 9.12
         ghcup install cabal --set 3.14
 
     - name: Install dependencies
@@ -47,7 +47,7 @@ jobs:
     - uses: actions/checkout@v6
     - name: Install ghc
       run: |
-        ghcup install ghc --set 9.8
+        ghcup install ghc --set 9.12
         ghcup install cabal --set 3.14
     - name: Install dependencies
       run: |
@@ -80,7 +80,7 @@ jobs:
         brew install ghcup
     - name: Install ghc
       run: |
-        ghcup install ghc --set 9.8
+        ghcup install ghc --set 9.12
         ghcup install cabal --set 3.14
         echo "$HOME/.ghcup/bin" >> "${GITHUB_PATH}"
     - name: Install dependencies

.github/workflows/release-candidate.yml

@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@v6
     - name: Install ghc
       run: |
-        ghcup install ghc --set 9.8
+        ghcup install ghc --set 9.12
         ghcup install cabal --set 3.12
 
     - name: Install dependencies
@@ -88,7 +88,7 @@ jobs:
 
     - name: Install ghc and cabal
       run: |
-        ghcup install ghc --set 9.8
+        ghcup install ghc --set 9.12
         ghcup install cabal --set 3.12
         echo "$HOME/.ghcup/bin" >> "${GITHUB_PATH}"
 

CONTRIBUTING.md

@@ -215,9 +215,9 @@ Please follow these guidelines:
     external C libraries should especially be avoided.
 
 10. We aim for compatibility with at least the last three
-    released ghc versions, and sometimes more. Currently pandoc
-    can be compiled on ghc 8.10 and higher. All pull requests and
-    commits are tested automatically on GitHub Actions.
+    released ghc versions, and sometimes more.  Currently we
+    support ghc versions 9.6 and higher. All pull requests
+    and commits are tested automatically on GitHub Actions.
 
 Tests
 -----

pandoc.cabal

@@ -11,9 +11,7 @@ bug-reports:     https://github.com/jgm/pandoc/issues
 stability:       alpha
 homepage:        https://pandoc.org
 category:        Text
-tested-with:     GHC == 8.10.7, GHC == 9.0.2,
-                 GHC == 9.2.5, GHC == 9.4.4, GHC == 9.6.3,
-                 GHC == 9.8.2, GHC == 9.10.1
+tested-with:     GHC == 9.6.7, GHC == 9.8.4, GHC == 9.10.3, GHC == 9.12.2
 synopsis:        Conversion between markup formats
 description:     Pandoc is a Haskell library for converting from one markup
                  format to another.  The formats it can handle include