ECMAScript 6 Promises Test Suite

The `promises-es6-tests` package provides a compliance test suite specifically designed for the **draft** ECMA-262 6th Edition (ES6, now ES2015) Promises specification. Released at version 0.5.0, it explicitly states that it should not be considered final or complete and does not supersede the Promises/A+ test suite, advising users to run both. The package enables testing of Promise implementations in both Node.js and browser environments by requiring a minimal adapter interface, an extension of the Promises/A+ adapter. Due to its focus on a draft specification that was finalized as ES2015 in June 2015, and its last release being version 0.5.0, this package is effectively outdated and provides checks against an early, non-final version of the standard rather than the stable ES2015 Promises. Its utility for modern Promise implementations is therefore very limited, as the specification it targets has evolved significantly.