Adding some slack notifications for pkgcloud
Adding some slack notifications for pkgcloud

apla/pkgcloud,Phanatic/pkgcloud,andrewsomething/pkgcloud,DonSchenck/pkgcloud,mcanthony/pkgcloud,mdsummers/pkgcloud,dionjwa/pkgcloud,Hopebaytech/pkgcloud,temka1234/pkgcloud,bunglestink/pkgcloud,hacor/pkgcloud,pkgcloud/pkgcloud,songanbui/pkgcloud,Phanatic/pkgcloud