Add package ‘slug’
Add package ‘slug’

The tiny package provides type-safe slug implementation that plays
nicely with Yesod ecosystem.

GregorySchwartz/stackage,mgajda/stackage,Daniel-Diaz/stackage,judah/stackage,simonmichael/stackage,phaazon/stackage,l29ah/stackage,fimad/stackage,brendanhay/stackage,michalkonecny/stackage,agrafix/stackage,creichert/stackage,fpco/stackage,DanielG/stackage,k0ral/stackage,massysett/stackage,asr/stackage,meteficha/stackage,jonschoning/stackage,ygale/stackage,soenkehahn/stackage,athanclark/stackage,ethercrow/stackage,clinty/stackage,mstksg/stackage,spencerjanssen/stackage,christiaanb/stackage,Gabriel439/stackage,peti/stackage,codedmart/stackage,wereHamster/stackage,lwm/stackage,mrkkrp/stackage,bartavelle/stackage,jaspervdj/stackage,garetxe/stackage,phadej/stackage,nomeata/stackage,marcinmrotek/stackage,iand675/stackage,int-index/stackage,alanz/stackage,Shimuuar/stackage,stackbuilders/stackage