[README] Adding a npm version badge
[README] Adding a npm version badge

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