Fix old options in phpunit config

Author: judgej

phpunit.xml.dist

@@ -8,16 +8,15 @@
          convertWarningsToExceptions="true"
          processIsolation="false"
          stopOnFailure="false"
-         syntaxCheck="false"
          beStrictAboutTestsThatDoNotTestAnything="false">
     <testsuites>
         <testsuite name="Omnipay Test Suite">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>
-    <filter>
-        <whitelist>
+    <coverage>
+        <include>
             <directory>./src</directory>
-        </whitelist>
-    </filter>
+        </include>
+    </coverage>
 </phpunit>