v1.0.21

Changes:

• 090b040 Additional message templates added
• e6229dd Added implementation of carousel, coupon and catalog message
• 3b41a83 Bump graph api version to 18
• e78aa9d Library dependencies updates
• 6f2fc68 Added two optional property for authentication messages
• 6236b68 Catalog, Coupon code and carousel message example added

This list of changes was auto generated.