Not able to install omnipay packages into my application.

[pradeep-sawant2501]

Hi guys, I am using league/omnipay": "^3.0 into composer.json file. Most of package support 2.0 and so while installing packages not able to installed and used. Please guide me how should I install all 2.0 gateway packages into my projects.

This are few gateways installed successfully:
"omnipay/firstdata": "~3.0",
"omnipay/paypal": "^3.0",
"omnipay/pin": "~3.0",
"omnipay/securepay": "^3.0",
"omnipay/stripe": "^3.1",
"omnipay/sagepay": "~3.0"