Merge pull request #275 from yesodweb/mattp/support-ghc-84

Support GHC 8.4 and update CI for newer versions

.github/workflows/tests.yml

@@ -16,9 +16,13 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
         stack_args:
           - --resolver=nightly
+          - --resolver=lts-21
+          - --resolver=lts-20
+          - --resolver=lts-19
           - --resolver=lts-18
           - --resolver=lts-16
           - --resolver=lts-14
+          - --resolver=lts-12
           - --stack-yaml=stack-ghc-9.2.yaml
         exclude:
           - os: windows-latest

shakespeare.cabal

@@ -35,7 +35,7 @@ extra-source-files:
 
 library
     default-language: Haskell2010
-    build-depends:   base             >= 4.12    && < 5
+    build-depends:   base             >= 4.11    && < 5
                    , time             >= 1
                    , containers
                    , template-haskell >= 2.7