Allow qualified symbols as references

[ikitommi]

(m/validate
 [:map {:registry {:user/id :int
                   "user/name" :string
                   'user/country [:enum "UA"]}}
  :user/id 
  "user/name" 
  'user/country]
 {:user/id 123
  "user/name" "Tiina"
  'user/country "UA"})
; => true