Package ships no license file and its upstream repository
(https://github.com/shtylman/node-stackback) contains none; its README has no license section
either.

Canonical MIT text, the license declared in the package's package.json, retrieved via
`gh api licenses/mit`. The copyright holder is the `author` field of that same package.json
("Roman Shtylman <shtylman@gmail.com>"); no year is stated anywhere upstream, so none is
asserted here.