fix: Change errorArray to messages in struct returned from Send

The docs states the array or errors should be called messages.
This breaks the interface in the docs... and is not compatible with the other 5 providers supplies with CBMailServices.

BREAKING CHANGE: key renamed from `errorArray` to `messages` to be compatible with new version of cbMailServices.

models/protocols/SendGridProtocol.cfc

@@ -22,7 +22,7 @@ component extends="cbmailservices.models.AbstractProtocol" {
     * @payload The payload to deliver
     */
     public function send( required cbmailservices.models.Mail payload ) {
-        var rtnStruct   = {error=true, errorArray=[], messageID=''};
+        var rtnStruct   = {error=true, messages=[], messageID=''};
         var mail = payload.getMemento();
 
         var body = {
@@ -121,7 +121,7 @@ component extends="cbmailservices.models.AbstractProtocol" {
         };
 
         if ( left( cfhttp.status_code, 1 ) != "2" && left( cfhttp.status_code, 1 ) != "3"  ) {
-            rtnStruct.errorArray = deserializeJSON( cfhttp.filecontent ).errors;
+            rtnStruct.messages = deserializeJSON( cfhttp.filecontent ).errors;
         }
         else {
             rtnStruct.error = false;