is-falsey-x utility

The `is-falsey-x` package provides a highly focused utility function, `isFalsey`, designed to accurately determine if a given JavaScript value is 'falsey'. This includes standard JavaScript falsey values such as `false`, `0`, `-0`, `0n` (BigInt zero), `""` (empty string), `null`, `undefined`, and `NaN`. The current stable version is 2.1.1, with the project exhibiting a cadence of frequent minor patch releases, often for 'auto build' purposes, and critical security updates as indicated by the v2.1.1 release. Its key differentiator lies in its minimal footprint and singular purpose, offering a lean alternative to incorporating larger utility libraries like Lodash or Underscore when only a falsey check is needed. It is designed to operate seamlessly across both Node.js environments (requiring Node.js >= 8.11.4) and modern browser contexts.