Add new payment processors to change log

Author: oschwald

CHANGELOG.md

@@ -10,6 +10,20 @@ CHANGELOG
     * `/device/session_id`
 * Added support for new Email outputs. These are:
     * `/email/first_seen`
+* The following payment processors were added to the `Payment.Processor` enum:
+    * 'AMERICAN_EXPRESS_PAYMENT_GATEWAY'
+    * 'BLUESNAP'
+    * 'COMMDOO'
+    * 'CUROPAYMENTS'
+    * 'EXACT'
+    * 'OCEANPAYMENT'
+    * 'PAYMENTWALL'
+    * 'PAYZA'
+    * 'SECURETRADING'
+    * 'SOLIDTRUST_PAY'
+    * 'VANTIV'
+    * 'VERICHECK'
+    * 'VPOS'
 
 1.4.0 (2017-02-22)
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