Replace 1.18.0.0 with 1.18.0 in 'bootstrap.sh'.
Replace 1.18.0.0 with 1.18.0 in 'bootstrap.sh'.

Fixes #1473.

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