Postinstall Cache

A caching layer for postinstall script modules used in Node.js package development. Current stable version is 0.7.0, with updates released as needed. It provides a simple cache to avoid redundant execution of 'postinstall' scripts (such as postinstall-js, postinstall-css, postinstall-browserify). Key differentiators: lightweight, zero dependencies, focuses solely on caching for the specific postinstall ecosystem. Compared to generic build caches, it is purpose-built for the postinstall pipeline.