Virlutils

This release corrects the libtmux version. There were broken versions between 0.27 and 0.34. This release requires 0.34 or later.

It's been a long time coming, but this release finally removes all vestiges of VIRL/CML 1.x support. This is officially the **cmlutils** release, supporting CML 2.x+.

Thanks to Salah Gherdaoui for the surgery on the 1.x bits, as well as a tmux contribution. Thanks to Tomas Mikuska for some additional testing and coverage bits.

In addition to the changes above, this release fixes some performance issues relating to clustering and should work nicely with the new CML 2.7 release.

This release improves tests with the latest CML, 2.6.1. It also removes support for Python 3.7 and adds Python 3.12 support. Additionally:

* In the NSO generation code, don't use reserved name `type` as a variable name.
* Add support for Cat8Kv and Cat9Kv in NSO generation code (140)

This release makes v2 tests more robust (thanks to Tomas Mikuska) and makes better use of the virl2_client for cluster operations.

This release adds cluster support when listing nodes and for providing general info about the cluster.

Additionally some tests have been updated to make things more reliable when dealing with deprecated virl2-client methods.

Fix for 135 where the `console` command did not work with CML 2.3+.