CI: use GHC 9.8.1 and 9.6.3

 - 9.6.3 fixed the false positives with `-Wredundant-constraints`

 - `haskell/actions/setup` got deprecated in favor of `haskell-actions/setup`

.github/workflows/ci.yaml

@@ -19,12 +19,12 @@ jobs:
     strategy:
       matrix:
         cabal: ["3.10"]
-        ghc:   ["9.2.8", "9.4.7", "9.6.2"]
+        ghc:   ["9.2.8", "9.4.7", "9.6.3", "9.8.1"]
     env:
       CONFIG: "--enable-tests --enable-benchmarks --flags=dev"
     steps:
       - uses: actions/checkout@v4
-      - uses: haskell/actions/setup@v2
+      - uses: haskell-actions/setup@v2
         id: setup-haskell-cabal
         with:
           ghc-version: ${{ matrix.ghc }}

megaparsec-tests/megaparsec-tests.cabal

@@ -5,7 +5,7 @@ license:         BSD-2-Clause
 license-file:    LICENSE.md
 maintainer:      Mark Karpov <[email protected]>
 author:          Megaparsec contributors
-tested-with:     ghc ==9.2.7 ghc ==9.4.4 ghc ==9.6.1
+tested-with:     ghc ==9.2.8 ghc ==9.4.7 ghc ==9.6.3 ghc ==9.8.1
 homepage:        https://github.com/mrkkrp/megaparsec
 bug-reports:     https://github.com/mrkkrp/megaparsec/issues
 synopsis:        Test utilities and the test suite of Megaparsec

megaparsec.cabal

@@ -9,7 +9,7 @@ author:
     Paolo Martini <[email protected]>,
     Daan Leijen <[email protected]>
 
-tested-with:     ghc ==9.2.8 ghc ==9.4.7 ghc ==9.6.2
+tested-with:     ghc ==9.2.8 ghc ==9.4.7 ghc ==9.6.3 ghc ==9.8.1
 homepage:        https://github.com/mrkkrp/megaparsec
 bug-reports:     https://github.com/mrkkrp/megaparsec/issues
 synopsis:        Monadic parser combinators
@@ -68,7 +68,9 @@ library
         transformers >=0.4 && <0.7
 
     if flag(dev)
-        ghc-options: -Wall -Werror -Wpartial-fields -Wunused-packages
+        ghc-options:
+            -Wall -Werror -Wredundant-constraints -Wpartial-fields
+            -Wunused-packages
 
     else
         ghc-options: -O2 -Wall