Fix #3076: enable bifunctors-5.5
Fix #3076: enable bifunctors-5.5

iand675/stackage,int-index/stackage,fimad/stackage,lwm/stackage,simonmichael/stackage,fpco/stackage,massysett/stackage,michalkonecny/stackage,creichert/stackage,peti/stackage,ethercrow/stackage,stackbuilders/stackage,spencerjanssen/stackage,jonschoning/stackage,clinty/stackage,mgajda/stackage,k0ral/stackage,athanclark/stackage,Shimuuar/stackage,wereHamster/stackage,garetxe/stackage,Daniel-Diaz/stackage,asr/stackage,soenkehahn/stackage,phaazon/stackage,mrkkrp/stackage,mstksg/stackage