This update for 2ping fixes the following issues:

Update to version 4.5.1

* 2ping.bash_completion: Make more resilient to failure / missing features.
* Minimum Python version changed from 3.5 to 3.6.
* Minor no-op code and distribution updates.

Update to version 4.5 

* Added PyCryptodome support (recommended over PyCrypto, though the latter is still detected/supported).
* Replaced best_poller module with Python native selectors module.
* Changed --flood output: dots/backspaces are no longer printed, and loss results / errors display full details.
* --audible tones will only occur if stdout is a TTY.
* Improved hostname/IP display edge cases.
* Added an AF_UNIX --loopback test mode.
* Listener sockets are added and removed as needed, instead of being re-created on each rescan.
* Listener sockets are automatically rescanned periodically.
* Multiple systemd sockets are now allowed.
* A run can be both a listener and a client at the same time (mainly useful for smoke testing).
* Other socket handling refactoring.
* Other code refactoring.
* Listener statistics are displayer per-bind.