Add GHC 9.0 to CI (#35)

.github/workflows/ci.yml

@@ -16,15 +16,15 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        ghc: ['8.10', '8.8', '8.6', '8.4', '8.2', '8.0']
+        ghc: ['9.0', '8.10', '8.8', '8.6', '8.4', '8.2', '8.0']
         include:
         - os: windows-latest
         - os: macOS-latest
 
     steps:
     - run: git config --global core.autocrlf false
     - uses: actions/checkout@v2
-    - uses: actions/setup-haskell@v1
+    - uses: haskell/actions/setup@v1
       id: setup-haskell
       with:
         ghc-version: ${{ matrix.ghc }}

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018-2020 Andrey Mokhov
+Copyright (c) 2018-2021 Andrey Mokhov
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

selective.cabal

@@ -5,13 +5,13 @@ license:       MIT
 license-file:  LICENSE
 author:        Andrey Mokhov <[email protected]>, github: @snowleopard
 maintainer:    Andrey Mokhov <[email protected]>, github: @snowleopard
-copyright:     Andrey Mokhov, 2018-2020
+copyright:     Andrey Mokhov, 2018-2021
 homepage:      https://github.com/snowleopard/selective
 bug-reports:   https://github.com/snowleopard/selective/issues
 category:      Control
 build-type:    Simple
 cabal-version: 1.18
-tested-with:   GHC==8.10, GHC==8.8, GHC==8.6, GHC==8.4, GHC==8.2, GHC==8.0
+tested-with:   GHC==9.0, GHC==8.10, GHC==8.8, GHC==8.6, GHC==8.4, GHC==8.2, GHC==8.0
 description:   Selective applicative functors: declare your effects statically,
                select which to execute dynamically.
                .