Empty form API
Format: Fmt.Map
Extend Set.to_list
Audience implementation
Provide Group.I.admin
Move form audience to Form.Audience.t
Include audience in form
Lowercase JSON value
Document form creation
Update field JSON format
Field documentation
Format fix
Form update
Implement PUT endpoints
Implement PUT forms/{id}
Update docs
Fix "Null" unpack bug
Improve message tracing
Version number