bugfix: build failures

[luke-hill]

Summary

Build failures fix - Primarily related to a couple of gems not liking ruby2 vs ruby3 syntax

Details

• Fix up Appraisals build contexts
• Add new guards
• Double check version decrements for old version support

Motivation and Context

Fix stuff

How Has This Been Tested?

CI

Screenshots (if appropriate):

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue).
• [ ] New feature (non-breaking change which adds functionality).
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist:

• [ ] I've added tests for my code.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.

[olleolleolle]

🥇 Awesome fixing!

[luke-hill]

First of a few PR's to come in to fix things.