compatiblity for 1.5.0

[MatthewPocock]

Description

Finish changes for compatibility with dbt core v1.4 & v1.5 as per dbts upgrade guide

Change for dbt 1.5 upgrade

• include python 3.11 in test matrix
• use standard library gethostname() method for anonymous telemetry
• elegantly stub model contracts as per dbt instructions
• move timestamp macros

Other

• avoid compatibility issues by using compatible release operator as in #45

[tom-juntunen]

These changes look good to me, and have passed all tests on my machine.
Merging this pull request into main and tagging @codeforkjeff for the release cut and publish.
Let me know if there is anything else I can do on v1.5.0.

I am working on a dbt-1-6-0-compat branch that I will push today.

More work to be done for 1-7-0 if we decide to use the new Capabilities class for standardizing and simplifying feature support or stub-outs.

[codeforkjeff]

Tagged v1.5.0 and uploaded packages to PyPI.

Thanks @MatthewPocock for this work! Apologies for the very long delay in getting it merged.