Support symbol resolution with clojure namespace aliasing

[mfikes]

If you have ClojureScript code that looks like

(ns foo.core
  (:require [cojure.spec :as s]))

(s/def ::even? (s/and number? even?))

an improvement to Cursive would be smarts to understand clojure -> cljs namespace aliasing logic so that the s/def and s/and, etc. are resolved in the IDE.

[cursive-ide]

Yes, this is #1481 I believe.