Remove support for GHC 8.0 and 8.2

This is because of Semigroup support.

Author: andygill

.travis.yml

@@ -33,10 +33,6 @@ matrix:
       addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.6.5","cabal-install-2.4"]}}
     - compiler: ghc-8.4.4
       addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.4.4","cabal-install-2.4"]}}
-    - compiler: ghc-8.2.2
-      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.2.2","cabal-install-2.4"]}}
-    - compiler: ghc-8.0.2
-      addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-8.0.2","cabal-install-2.4"]}}
     - compiler: ghc-head
       addons: {"apt":{"sources":["hvr-ghc"],"packages":["ghc-head","cabal-install-head"]}}
       env: GHCHEAD=true

javascript-bridge.cabal

@@ -11,9 +11,7 @@ category:            Network
 build-type:          Simple
 extra-source-files:  CHANGELOG.md, README.md, HISTORY.md
 cabal-version:       >=1.10
-tested-with:         GHC == 8.0.2
-                   , GHC == 8.2.2
-                   , GHC == 8.4.4
+tested-with:         GHC == 8.4.4
                    , GHC == 8.6.5
                    , GHC == 8.8.1