PNGQuant Stream Wrapper

The `pngquant` package provides a Node.js readable/writable stream wrapper for the `pngquant` command-line utility. It allows developers to optimize PNG images by reducing their color palette directly within a Node.js stream pipeline, making it suitable for processing images from HTTP requests, file uploads, or other stream sources without requiring temporary files. Currently at version 4.2.0, its release cadence is not explicitly stated in the provided information, but it appears actively maintained given recent version bumps and project activity. Key differentiators include its efficient stream-based API, direct integration with the powerful `pngquant` CLI for high-quality optimization, and robust TypeScript type definitions for enhanced developer experience. This design simplifies image optimization workflows in server-side applications and microservices.