⚡ valuein/invoice:4.1 → 3 🎉

• 🎉 Added tax mode
• 🎉 Added discount percentage and fixed amount charges
• 🎉 Added subscription preview API

🎉 New features

Added tax mode on invoice engine charges

Add tax mode to handle charges prices expressed as tax included or tax excluded.

Added discount percentage and fixed amount charges

Charge of type DiscountFixedAmount and DiscountPercentage have been added.

Added subscription preview API

Added the subscriptions preview to calculate invoice items via API.