maintenance: update default engine

[bootcoder]

Problem

Fresh install today and encountered the following error while building out a straight CLI wrapper:

chatgpt-ruby-2.1.1/lib/chatgpt/client.rb:89:in `handle_error': 
The model `text-davinci-002` has been deprecated, 
learn more here: https://platform.openai.com/docs/deprecations 
(ChatGPT::APIError)

Solution

Updates default model per openai docs from text-davinci-002 👉 gpt-4o-mini with a simple find & replace

Checks

• rake test: 19 run / 46 assertions / 0 failures / 0 skips
• rubocop: 16 inspected / 0 offenses
• yard doc: no change

Rubocop Cleanup

• branch main contains 13 offenses which are resolved via:
• client.rb#request_streaming - reduce complexity
  • Main Change: chunk.split("\n").filter { |c| c.start_with?('data:') }.each do |line|
  • Secondary: New method request_options (Happy to rm, lmk. May be unneeded in hindsight)
• test/test_helper.rb - multiple violations
  • Main Change: new mock_response_body method with uniform signature

---

Additional Changes

• Gems
  • bundle generates diff in gemfile.lock Observed on both main && feature branches
    • Been a few years since I've done public gem work, not sure if these should be committed or discarded.
    • Seems like commit but not sure... 🤷 (Happy to rm, lmk)
  • gem yard
    • README.md includes a reference to docs with bundle exec yard doc but it is not included in the bundle
    • gem 'yard' added to development, enabling above command
    • Not sure how you feel about expanding dependencies vs this trivial thing..... (Happy to rm, lmk)
• .DS_Store
  • Nit: OSX files clutter up your repo
  • Solution: Cleaned up + added to .gitignore
  • Tip: Setup ~/.gitignore_global to cover things like this in the future