[mod] [#437] Don't wrap client-side pings (evaluate)

Requires further review.

This is a minor but potentially BREAKING change.
Zero urgency, consider holding till next breaking set.

Before this commit:

  Client-side `[:chsk/ws-ping]` events are wrapped to
  `[:chsk/recv [:chsk/ws-ping]]` when `wrap-recv-evs?` is true.

After this commit:

  Client-side `[:chsk/ws-ping` events are NOT wrapped, even
  when `wrap-recv-evs?` is true.

MOTIVATION:

  While `:chsk/ping` is indeed pushed from server, `:chsk/recv` is
  in practice reserved for user-level events. Keeping it that way
  may be better (more convenient for users).

src/taoensso/sente.cljc

@@ -1517,8 +1517,8 @@
                             :done/did-handshake)
 
                           (when (= clj :chsk/ws-ping)
-                            (-chsk-send!    chsk [:chsk/ws-pong] {:flush? true})
-                            (put! (:<server chs) [:chsk/ws-ping])
+                            (-chsk-send!     chsk [:chsk/ws-pong] {:flush? true})
+                            (put! (:internal chs) [:chsk/ws-ping])
                             :done/sent-pong)
 
                           (if-let [cb-uuid ?cb-uuid]