Updates clj-ssh to latest JSch 0.2.15 (#75)

Upgrades JSch to the latest 0.2.15 version and aligns JNA version to
5.14.0.

NOTE: this change will transitively depend on the latest 1.77 Bouncy
      Castle version.

Updates clj-ssh to latest JSch 0.2.13 (#74)

Upgrades JSch version and aligns junixsocket version to the one used
by JSch.

NOTE: this will transitively depend on the current latest Bouncy Castle
      1.76 version.

Updates clj-ssh to latest JSch 0.2.12 (#73)

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Release 0.5.14

- Remove println from scp code

Release 0.5.13

- Make clojure dependency have provided scope
  Closes #25

- Fix race condition in ssh-exec function when command finishes before we
  enter with-channel-connection

- ssh/download: fix :recursive and :preserve flags arity errors.
  Recursive still doesn't work correctly: clj-ssh writes every file into the
  same output.

- Fixed recursive scp invocation.

- fix trace/tracef mixup.

- Fix missing parens

Release 0.5.12

- Update jsch and jsch agentproxy
  jsch 0.1.53 agentproxy-version 0.0.9

- Remove extra arg to throw
  This makes clj-ssh compatible with Clojure 1.8, which does not allow the
  extra argument to throw.

Release 0.5.11

- Lock known hosts file
  Try and prevent concurrent read and writes to the known hosts file.

- Fix :out :stream in the cli namespace
  Caller becomes responsible for closing the session.

  Closes #29