The simple_oauth gem had deprecation warnings with Ruby 3.4's URI module.
Since we only use basic OAuth 1.0a HMAC-SHA1 signing, implemented a minimal
OAuth module directly in the gem. This removes an external dependency and
fixes the deprecation warnings.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
This is a small update to to the project Gemfile to rspec at the
expected version, and to point at the HTTPS version of Rubygems.org. The
specs then pass with supported Ruby versions (anything above 1.8
really).