Rhombus 1.1 adds annotation definition forms and an as binding form

Sources: Racket blog, HN discussion
Summary: Rhombus 1.1 is released. The release adds annotation definition forms and an as binding form. The annotation forms let a user define annotations without writing macro-time code.
Why it matters: Defining an annotation no longer requires macro-time programming, which lowers what the language asks of ordinary users.