kew: Lightweight Promise Library

kew is a lightweight promise/deferred library specifically designed for Node.js environments. Developed by Medium, its primary goal was to offer a high-performance alternative to the Q library, particularly for server-side applications experiencing CPU bottlenecks in chained database callbacks. Currently at version 0.7.0, the package appears to be unmaintained, with its last commit dating back several years, indicating an abandoned status and no active release cadence. It provides a subset of promise functionality, including methods like `Q.resolve()`, `Q.reject()`, `Q.defer()`, and promise chaining with `.then()` and `.fail()`. Unlike more comprehensive promise libraries, kew intentionally implements only the features necessary for the common server-side use cases identified by its original developers, prioritizing minimal footprint and speed.