support shadow-cljs / nbb style reader conditionals

[raymcdermott]

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The code using #?@ all works but is greyed out in the editor. It is treated OK in the standard #? form

(ns io.ok2cry.cry
  (:require
    #?@(:org.babashka/nbb [["crypto" :as crypto]]
        :cljs [])
    #?@(:org.babashka/nbb [["buffer" :as buffer]]
        :cljs [])
    [clojure.string :as string]
    [clojure.edn :as edn]
    [promesa.core :as p]))