Add constraint "pretty-show < 1.9" per #4073
Add constraint "pretty-show < 1.9" per #4073

fpco/stackage,wereHamster/stackage,mstksg/stackage,soenkehahn/stackage,asr/stackage,peti/stackage,ethercrow/stackage,athanclark/stackage,mgajda/stackage,massysett/stackage,stackbuilders/stackage,michalkonecny/stackage,Daniel-Diaz/stackage,spencerjanssen/stackage,clinty/stackage,fimad/stackage,simonmichael/stackage,jonschoning/stackage,mrkkrp/stackage,iand675/stackage,int-index/stackage