Update to python 3.11+

Python 3.9 is EOL
Python 3.10 is almost EOL.

8.1.3

Fix classifiers.txt: typo in python version

Fix parallel execution failure handling

8.1.2

Fix `SSHClient.execute_together` for `ExecHelperTimeoutError` prepara…

8.1.1

What's Changed

• Fix chroot_exe when used with context manager by @gjkloosterman in #156

Full Changelog: 8.1.0...8.1.1

8.1.0

• chroot executable can be customized
• paramiko key policy changes to warning for security reasons

8.0.1

Mention API extension in readme

8.0.0.post0 - fix readme for 8.0.0

Fix README.rst: drop old versions from readme

8.0.0

Allow to disable ssh agent usage

7.4.0

tags rules for CD

7.3.6

re.Pattern is also correct mask rule

* drop asynctest test requirement: never supported python 3.8+, unittest from python3.8 can mock async