[#326] project.clj: disable dev dependencies

At least one person apparently seems to be somehow transitively
pulling in Timbre's :dev dependencies.

Unclear how/why that might be happening.

In any case, as a temporary workaround- it's not a big problem to
just disable these dependencies by default for now.

project.clj

@@ -30,7 +30,7 @@
    :1.9      {:dependencies [[org.clojure/clojure "1.9.0"]]}
    :1.10     {:dependencies [[org.clojure/clojure "1.10.2"]]}
    :depr     {:jvm-opts ["-Dtaoensso.elide-deprecated=true"]}
-   :dev      [:1.10 :test :server-jvm :depr :3pa]
+   :dev      [:1.10 #_:test :server-jvm :depr #_:3pa]
 
    :3pa ; 3rd-party appenders
    {:dependencies