CI: Drop testing on ghc 8.0.2.

.github/workflows/ci.yml

@@ -43,8 +43,6 @@ jobs:
       fail-fast: true
       matrix:
         versions:
-          - ghc: '8.0.2'
-            cabal: '2.4'
           - ghc: '8.2.2'
             cabal: '2.4'
           - ghc: '8.4.4'

pandoc.cabal

@@ -11,7 +11,7 @@ bug-reports:     https://github.com/jgm/pandoc/issues
 stability:       alpha
 homepage:        https://pandoc.org
 category:        Text
-tested-with:     GHC == 8.0.2, GHC == 8.2.2, GHC == 8.4.4, GHC == 8.6.5,
+tested-with:     GHC == 8.2.2, GHC == 8.4.4, GHC == 8.6.5,
                  GHC == 8.8.3, GHC == 8.10.1
 synopsis:        Conversion between markup formats
 description:     Pandoc is a Haskell library for converting from one markup