Added email valid field constant to contact

Author: akapa

src/Suite/Api/Contact/Contact.php

@@ -10,6 +10,7 @@ class Contact
 {
     const FIELD_ID = 'id';
     const FIELD_EMAIL = 3;
+    const FIELD_EMAIL_VALID = 47;
     const FIELD_UID = 'uid';
 
     /* @var Client */