Upgrade to PHP 8.0 (#312)

* Upgrade to PHP 8.0

* Closure of Payir and walleta payment gateways and unknown and suspicious activity of idpay

Author: Rayiumir

README.md

@@ -57,15 +57,13 @@ For PHP integration you can use [shetabit/multipay](https://github.com/shetabit/
 - [digipay](https://www.mydigipay.com/) :heavy_check_mark:
 - [etebarino (Installment payment)](https://etebarino.com/) :heavy_check_mark:
 - [fanavacard](https://www.fanava.com/) :heavy_check_mark:
-- [idpay](https://idpay.ir/) :heavy_check_mark:
 - [irankish](http://irankish.com/) :heavy_check_mark:
 - [local](#local-driver) :heavy_check_mark:
 - [jibit](https://jibit.ir/) :heavy_check_mark:
 - [nextpay](https://nextpay.ir/) :heavy_check_mark:
 - [omidpay](https://omidpayment.ir/) :heavy_check_mark:
 - [parsian](https://www.pec.ir/) :heavy_check_mark:
 - [pasargad](https://bpi.ir/) :heavy_check_mark:
-- [payir](https://pay.ir/) :heavy_check_mark:
 - [payfa](https://payfa.com/) :heavy_check_mark:
 - [paypal](http://www.paypal.com/) (will be added soon in next version)
 - [payping](https://www.payping.ir/) :heavy_check_mark:
@@ -80,7 +78,6 @@ For PHP integration you can use [shetabit/multipay](https://github.com/shetabit/
 - [sizpay](https://www.sizpay.ir/) :heavy_check_mark:
 - [toman](https://tomanpay.net/) :heavy_check_mark:
 - [vandar](https://vandar.io/) :heavy_check_mark:
-- [walleta (Installment payment)](https://walleta.ir/) :heavy_check_mark:
 - [yekpay](https://yekpay.com/) :heavy_check_mark:
 - [zarinpal](https://www.zarinpal.com/) :heavy_check_mark:
 - [zibal](https://www.zibal.ir/) :heavy_check_mark:

composer.json

@@ -84,7 +84,7 @@
         }
     ],
     "require": {
-        "php": ">=7.2",
+        "php": ">=8.0",
         "illuminate/broadcasting": "^5.0|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0",
         "illuminate/support": "^5.0|^6.0|^7.0|^8.0|^9.0|^10.0|^11.0",
         "shetabit/multipay": "^1.0"