Update version

Initial commit - Pobo Ruby SDK v1.0.0

Features:
- Client for Pobo API V2
- Import/export products, categories, blogs, parameters
- Webhook handler with signature verification
- Localized strings support
- Full test suite

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>