Ruby Gemini AI 3.1.0

New version available on RubyGems:

gem 'gemini-ai', '~> 3.1'

New in this version:

• Upgrading to Faraday 2.8.1
• add timeout option #7 - thanks @naoa!
• Adding support to configure timeout:

client = Gemini.new(
  credentials: { service: 'vertex-ai-api', region: 'us-east4' },
  options: {
    model: 'gemini-pro',
    connection: { request: { timeout: 5 } }
  }
)