Update CI

Author: goodlyrottenapple

.github/workflows/stack.yml

@@ -38,11 +38,8 @@ jobs:
         os: [ubuntu-latest, macOS-latest]
         # use this to specify what resolvers and ghc to use
         plan:
-        # - { resolver: "--resolver lts-9"  }    # ghc-8.0.2
-        # - { resolver: "--resolver lts-11"  }   # ghc-8.2.2
-        # - { resolver: "--resolver lts-12"  }   # ghc-8.4.4
-        - { resolver: "--resolver lts-14"  }   # ghc-8.6.5
-        - { resolver: "--resolver lts-16"  } 
+        - { resolver: "--resolver lts-18"  }   # ghc-8.10
+        - { resolver: "--resolver lts-20"  }   # ghc-9.2
         - { resolver: "--resolver nightly" }
         # - { resolver: ""                   }
         # use this to include any dependencies from OS package managers
@@ -74,4 +71,4 @@ jobs:
       run: |
         stack --no-terminal $ARGS test --bench --no-run-benchmarks
       env:
-        ARGS: ${{ matrix.plan.resolver }}
+        ARGS: ${{ matrix.plan.resolver }}