FlyingPress 4.13.4

- Improvement: Cache compatibility for WeGlot URL translation
- Improvement: Leverage WordPress HTTP API to download third party resources for better compatibility

- Improvement: Better used CSS detection

- New: WP CLI commands for preload cache, purge pages , purge everything and activate license , try `wp flying-press`
- Improvement: Efficient logic for checking if WP_CACHE constant is set
- Improvement: Adjusted FlyingPress controls after custom css toggle in Elementor
- Improvement: Higher loading priority for preloaded fonts
- Improvement: Upgraded assets minification library
- Fix: Adding display=swap to encoded Google font URLs resulted in invalid font
- Fix: A warning while fetching WooCommerce product categories