Added Checkout.com to composer.json

Author: beinbm

composer.json

@@ -45,7 +45,8 @@
         "targetpay",
         "twocheckout",
         "worldpay", 
-        "payU"
+        "payU",
+        "checkoutcom"
     ],
     "homepage": "https://github.com/thephpleague/omnipay",
     "license": "MIT",
@@ -119,7 +120,8 @@
         "omnipay/payu": "PayU",
         "paypronl/omnipay-paypro": "PayPro",
         "samvaughton/omnipay-barclays-epdq": "Barclays ePDQ",
-        "teaandcode/omnipay-worldpay-xml": "WorldPay XML Direct"
+        "teaandcode/omnipay-worldpay-xml": "WorldPay XML Direct",
+        "fotografde/omnipay-checkoutcom": "Checkout.com"
     },
     "extra": {
         "branch-alias": {