ClassCastException com.jcraft.jsch.Session cannot be cast to java.lang.String clj-ssh.ssh/session-impl

I try to run command on remote machine, I success to connect through my MAC over ssh without password (use `known_host`)

so I run through `REPL`:

```
(let [agent (clj-ssh.ssh/ssh-agent {})]
(clj-ssh.ssh/add-identity agent {
:known-hosts-path "/Users/maxim/.ssh/known_hosts"
:private-key-path "/Users/maxim/.ssh/id_rsa"
:public-key-path "/Users/maxim/.ssh/id_rsa.pub"
})
(let [session (clj-ssh.ssh/session agent "ops-ev19.comp.com" {:username "maxim" :strict-host-key-checking :no})]
(clj-ssh.ssh/with-connection session

(let [result (ssh session {:cmd "ls"})]
(println (:out result))))))
```

and get error:

`ClassCastException com.jcraft.jsch.Session cannot be cast to java.lang.String clj-ssh.ssh/session-impl (ssh.clj:318)`

---

I use `[clj-ssh "0.5.14"]`

Any ideas?

Start at session-impl in ssh.clj:318 and reproduce the reported REPL example with clj-ssh 0.5.14. Trace why the com.jcraft.jsch.Session value is treated as a String; done means the connection succeeds without a ClassCastException and the remote ls output is printed.

Written by the indexing model from the issue text.