Update README.md

Author: manchumahara

README.md

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+This is a Laravel/PHP package for uPay BD Payment Gateway. This package can be used in laravel or without laravel/php projects. You can use this package for headless/rest implementation as well as blade or regular mode development. We created this package while working for a project and thought to made it release for all so that it helps. 
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 ## Features
 
 1. [Create Payment/Take to Payment Page](https://github.com/codeboxrcodehub/upay#1-create-payment)