security/py-scp: Update to 0.13.2

Fix AssertionError in recursive get() when _rename is set and server sends
a POPD at the end (_depth > 0).

PR: 236778
Submitted by: Sergey Akhmatov <sergey@akhmatov.ru> (maintainer)
Relnotes: https://github.com/jbardin/scp.py/blob/v0.13.2/CHANGELOG.md