fix: Standardize currency field to uppercase in Amount

feat: Replace RDBMS lock with cache lock for improved performance

feat: implemented the 'extendUsing' method to easily create multiple …

…instances of a specified provider

Merge branch 'dev'

# Conflicts:
#	README.md
#	composer.json
#	config/gateways.php
#	src/AbstractProvider.php
#	src/GatewayManager.php
#	src/Providers/Asanpardakht/Asanpardakht.php
#	src/Providers/Irankish/Irankish.php
#	src/Providers/JiBit/JiBit.php
#	src/Providers/Mabna/Mabna.php
#	src/Providers/MabnaOld/MabnaOld.php
#	src/Providers/Mellat/Mellat.php
#	src/Providers/NextPay/NextPay.php
#	src/Providers/Pardano/Pardano.php
#	src/Providers/Parsian/Parsian.php
#	src/Providers/PayPing/PayPing.php
#	src/Providers/Payir/Payir.php
#	src/Providers/Payir/PayirSendException.php
#	src/Providers/SabaPay/SabaPay.php
#	src/Providers/Sadad/Sadad.php
#	src/Providers/Saman/Saman.php
#	src/Providers/Sizpay/Sizpay.php
#	src/Providers/Sizpay/SizpayException.php
#	src/Providers/Zarinpal/Zarinpal.php
#	src/RedirectResponse.php

feat: Irandargah provider added

replace ->app with app() (#61)

Manager removed `app` property

fix: support all new laravel versions

feat: added redirect response for Apis

fix: fix verify typo bug (fixes #49)

fix: fix verify bug (fixes #49)