Remove crypto-random dependency

[frankiesardo]

Hello there,

First of all, thanks for the library, it saves me a lot of time because it standardise similar code I was writing for each new project.

I was wondering what's the need for adding the crypto-random library when you can simply call

(defn rand-db-uri ^String []
  (str "datomic:mem://" (d/squuid)))

Thus avoiding adding unnecessary dependency and conflict resolutions. Just a minor thing but if that can improve user experience it's worth it!