"Invalid token" error when using abbreviated namespaced keywords #79

Requiring a namespace using :as alias, then using the alias to refer to a keyword in that namespace throws an error in slamhound.

Given src/my_test.clj:

(ns my-test
  (:require [clojure.test :as test]))
(prn :clojure.test/foo) ;; works but no alias
(prn ::test/foo) ;; this line bugs slamhound

Results in:

> lein run -m slam.hound src/my_test.clj
Failed to reconstruct: #<File src/my_test.clj>
Invalid token: ::test/foo

I think slamhound should parse this as clojure does (AFAIKT this feature has been in clojure since 1.0, though documentation is scarce) and interprets ::alias/word as a requirement to keep the :as alias.