update dependencies

update dependencies in order to fix security issues. (related to Symfony packages)

update docs

update package documents.

Move the main functionality to the `shetabit/multipay` PHP package

Now this package uses shetabit/multipay for its functionality.
so package is a Laravel wrapper for shetabit/multipay.

fix Pasargad gateway

The Pasargad gateway has fixed.

add Pasargad payment gateway

Now Pasargad payment gateway can be used.

Fix Behpardakht (Mellat)

• fix Behpardakht (Mellat)

Add mobile and email to Zarinpal gateway

now you can set payer's mobile and email for zarinpal gateway.

thanks @mobinzk for his contribution.

fix bug in Payir gateway

• convert rial to toman in Payir gateway.

Fix Idpay path

-fix Idpay psr-4 path

fix undefined index bug

• undefined index bug has fixed.