Setup dependencies are in 1.23, not 1.21.
Setup dependencies are in 1.23, not 1.21.

Addresses https://github.com/haskell/cabal/pull/2515#commitcomment-10654094.

themoritz/cabal,anton-dessiatov/cabal,valderman/cabal,sopvop/cabal,plow-technologies/cabal,thoughtpolice/cabal,randen/cabal,rimmington/cabal,martinvlk/cabal,lukexi/cabal,corngood/cabal,lukexi/cabal,Heather/cabal,rimmington/cabal,trskop/cabal,headprogrammingczar/cabal,mightybyte/cabal,garetxe/cabal,sopvop/cabal,gbaz/cabal,mightybyte/cabal,fugyk/cabal,trskop/cabal,kolmodin/cabal,fugyk/cabal,gbaz/cabal,garetxe/cabal,themoritz/cabal,beni55/cabal,mydaum/cabal,thomie/cabal,ian-ross/cabal,kolmodin/cabal,mydaum/cabal,gridaphobe/cabal,plow-technologies/cabal,randen/cabal,enolan/cabal,mmakowski/cabal,eric-stanley/cabal,thomie/cabal,ian-ross/cabal,x-y-z/cabal,beni55/cabal,ghc-android/cabal,edsko/cabal,Peaker/cabal,enolan/cabal,mmakowski/cabal,bennofs/cabal,thoughtpolice/cabal,x-y-z/cabal,martinvlk/cabal,ghc-android/cabal,edsko/cabal,sopvop/cabal,bennofs/cabal,valderman/cabal,themoritz/cabal,headprogrammingczar/cabal,Peaker/cabal,corngood/cabal,anton-dessiatov/cabal,Heather/cabal,eric-stanley/cabal,gridaphobe/cabal