[GEM] Inheritance Integer Type - Ruby 3.3.8 Update

[arkalim]

What

• Updated Ruby to v3.3.8
• No deprecation warnings
• Added Ruby 3.3 to the test matrix
• Updated Bundler to v2.6.9
• Updated gem-push workflow to set up Ruby 3.3
• Added bundle exec appraisal install to dev test command to fix Bundler::GemfileNotFound error
• Bumped gem version

Testing

• CI Passes
• Local testing works

Post-merge Steps

• Tag the latest master v0.2.2
• Create a new release on tag v0.2.2 which will trigger the gem-push workflow to publish the new gem version

Note: This PR is to be merged after adding the appraisal gem in #25

[liamloxton]

I think we should update bundler to 2.5+ as well as we discovered this is potentially necessary for Ruby 3.3.8