ci: try testing GHC 9.12.2

Author: thomasjm

.github/workflows/aeson-typescript.yml

@@ -20,6 +20,7 @@ jobs:
           - "9.6.7"
           - "9.8.4"
           - "9.10.2"
+          - "9.12.2"
         exclude:
         # These don't work on GitHub CI anymore because they need llvm@13, which became
         # disabled on 12/31/2024
@@ -85,6 +86,8 @@ jobs:
           yaml: "stack-9.8.4.yaml"
         - ghc: "9.10.2"
           yaml: "stack-9.10.2.yaml"
+        - ghc: "9.12.2"
+          yaml: "stack-9.12.2.yaml"
 
     steps:
     - uses: actions/checkout@v3

stack-9.12.2.yaml

@@ -0,0 +1,10 @@
+
+resolver: nightly-2025-07-31
+
+nix:
+  enable: false
+
+system-ghc: true
+
+packages:
+- .

stack-9.12.2.yaml.lock

@@ -0,0 +1,12 @@
+# This file was autogenerated by Stack.
+# You should not edit this file by hand.
+# For more information, please see the documentation at:
+#   https://docs.haskellstack.org/en/stable/topics/lock_files
+
+packages: []
+snapshots:
+- completed:
+    sha256: 3dec7f4c6dc2dc10047d2941a6bc9ee8fa6a84f6db932096cbd83a0ace83dfa1
+    size: 672916
+    url: https://raw.githubusercontent.com/commercialhaskell/stackage-snapshots/master/nightly/2025/7/31.yaml
+  original: nightly-2025-07-31