v2.3.0

Added

• Added missing webhook triggers (#220)
• Added provider field to token exchange response (#225)
• Added support for clean messages endpoint (#226, #228)
• Added support for custom headers field for Drafts and Messages (#223)
• Added support for overriding various fields of outgoing requests (#224)

Changed

• Fixed issue where attachments < 3mb were not being encoded correctly (#227, #222)