PHP 5.6 fixes for travis

.travis.yml

@@ -4,6 +4,7 @@ php:
   - 5.6
   - 7.0
   - 7.1
+  - 7.2
 
 
 before_script:

src/HydratableTrait.php

@@ -46,7 +46,7 @@ public function __construct(array $data = [])
         $this->setFromArray($data);
     }
 
-    public function isSet()
+    public function hasValues()
     {
         return $this->_hydratableIsSet;
     }
@@ -56,7 +56,7 @@ public function isSet()
      */
     public function isEmpty()
     {
-        return ! $this->isSet();
+        return ! $this->hasValues();
     }
 
     /**

src/Response/Models/PaymentRejectionReason.php

@@ -28,7 +28,7 @@ class PaymentRejectionReason implements ModelInterface
     /**
      * @return bool true if this object contains a value.
      */
-    public function isSet()
+    public function hasValues()
     {
         return $this->code !== null || $this->description !== null;
     }

src/ServerRequest/FpsRedirectionNotification.php

@@ -50,7 +50,7 @@ class FpsRedirectionNotification extends AbstractServerRequest
         'redirectedAccount',
     ];
 
-    public function isSet()
+    public function hasValues()
     {
         return $this->notificationUid !== null
             || $this->paymentUid !== null

tests/Response/PaymentAccountAddressTest.php

@@ -57,7 +57,7 @@ public function testFromArray()
             $paymentAccountAddress->fasterPaymentsStatus
         );
         $this->assertSame(
-            $paymentAccountAddress->fasterPaymentsStatus::ADDRESS_FPS_STATUS_ENABLED,
+            $paymentAccountAddress::ADDRESS_FPS_STATUS_ENABLED,
             $paymentAccountAddress->fasterPaymentsStatus->outboundStatus
         );
     }