ci: add GHC9.0.2, bump 8.10.4 -> 8.10.7

.github/workflows/ci.dhall

@@ -4,7 +4,8 @@ in    haskellCi.generalCi
         haskellCi.matrixSteps
         ( Some
             { ghc =
-              [ haskellCi.GHC.GHC8104
+              [ haskellCi.GHC.GHC902
+              , haskellCi.GHC.GHC8107
               , haskellCi.GHC.GHC884
               , haskellCi.GHC.GHC865
               ]

.github/workflows/ci.yaml

@@ -11,12 +11,19 @@ jobs:
           ghc-version: "${{ matrix.ghc }}"
       - name: Update Hackage repository
         run: cabal update
+      - name: cabal.project.local.ci
+        run: |
+          if [ -e cabal.project.local.ci ]; then
+            cp cabal.project.local.ci cabal.project.local
+          fi
       - name: freeze
         run: cabal freeze
       - uses: "actions/cache@v2"
         with:
           key: "${{ runner.os }}-${{ matrix.ghc }}-cabal-${{ hashFiles('cabal.project.freeze') }}"
-          path: "${{ steps.setup-haskell-cabal.outputs.cabal-store }} dist-newstyle"
+          path: |
+            ${{ steps.setup-haskell-cabal.outputs.cabal-store }}
+            dist-newstyle
       - name: Install dependencies
         run: cabal build all --enable-tests --enable-benchmarks --only-dependencies
       - name: build all
@@ -30,7 +37,8 @@ jobs:
         cabal:
           - '3.2'
         ghc:
-          - '8.10.4'
+          - '9.0.2'
+          - '8.10.7'
           - '8.8.4'
           - '8.6.5'
 name: Haskell CI