3.9.0

 * Remove observers from Model on end of the stream (Alexei Smirnov)
 * Fix Model#settings.acls doc type signature (Farid Nouri Neshat)
 * Use `localhost` instead of `::` for local (Daijiro Wachi)
 * Fix API doc for Model class property type (Candy)
 * Update package.json (sqlwwx)
 * Support remoting adapters with no ctx.req object (Piero Maltese)
 * update strong-error-handler (sqlwwx)
