Bump `cabal-version`.
Bump `cabal-version`.

lwm/haskellnews,chrisdone/haskellnews,chrisdone/haskellnews,lwm/haskellnews,haskellnews/haskellnews,haskellnews/haskellnews,jwaldmann/haskellnews,jwaldmann/haskellnews