Malicious code in react-editable-calendar (npm)

Source: amazon-inspector ef4c5725bd98fb80c8dc59c58f68627b6a69aa4c4ae16d3f0c70c011895144cb package.json declares a preinstall hook node src/utils/index.d.js, but the published tarball's files whitelist ships only dist/, README.md, and LICENSE — src/utils/index.d.js is not present, so npm install...