Release version 1.1.9 - Critical function redeclaration fix

Fixed critical function redeclaration error affecting versions 1.1.3-1.1.8
that caused fatal errors during plugin activation and deactivation.

Fixes:
- Function redeclaration error for wc_tpp_woocommerce_missing_notice()
- Fatal error "Cannot redeclare function" when plugin file loaded multiple times
- Plugin activation/deactivation failures

Technical Changes:
- Wrapped wc_tpp_woocommerce_missing_notice() in function_exists() check
- Moved function declaration before WooCommerce check for better organization
- Prevents fatal errors during WordPress plugin lifecycle events

Updated Files:
- wc-tier-and-package-prices.php (version 1.1.9, function safety check)
- composer.json (version 1.1.9)
- CHANGELOG.md (v1.1.9 section)
- All translation files compiled (.mo files)

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

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

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