add voip_carriers.e164_leading_plus for carrier-level configuration of E.164 dial string

lib/models/voip-carrier.js

@@ -21,6 +21,18 @@ VoipCarrier.fields = [
   {
     name: 'description',
     type: 'string'
+  },
+  {
+    name: 'account_sid',
+    type: 'string',
+  },
+  {
+    name: 'application_sid',
+    type: 'string'
+  },
+  {
+    name: 'e164_leading_plus',
+    type: 'number'
   }
 ];
 

lib/swagger/swagger.yaml

@@ -250,6 +250,8 @@ paths:
                   description: voip carrier name
                 description:
                   type: string
+                e164_leading_plus:
+                  type: boolean
               required: 
                 - name
       responses:
@@ -1613,6 +1615,8 @@ components:
           type: string
         description:
           type: string
+        e164_leading_plus:
+          type: boolean
       required:
         - voip_carrier_sid
         - name