Gravity Forms Help Scout Addon 2.3.0

Updated the minimum required Gravity Forms version to 2.1.
- Fixed conversations with attachments not being created on servers where allow_url_fopen is disabled.

- Added security enhancements.
- Added the Help Scout Conversation Created notification event.
- Added the {helpscout:[prop]} merge tag for use in notifications sent after the conversation has been created. Supported properties are id, number, status, subject, and url.
- Fixed a fatal error which can occur during feed processing if the get or create customer requests experience an issue.
- Fixed the BCC email addresses not being added to the conversation.
- Updated error logging statements.
- Updated the feed settings so mapping the customer first name field is required.

- Fixed the BCC email addresses not being added to the conversation