I have a question about amazonica: what the proper way to pass the content-length to s3/put-object?

I do something like this:

(s3/put-object
  {:metadata {:cache-control  "public,max-age:31536000,immutable" ; One year
              :content-length content-length
              :content-type   content-type}
   :bucket-name bucket-name
   ; etc.
})

Does anyone know if https://github.com/ptaoussanis/faraday is still alive? Or is someone else planning on picking it up?

Or is everyone just migrating to Amazonica or something else for DynamoDB?