Babel Preset njs

A Babel preset for transforming modern JavaScript (up to ES2021) into code compatible with njs (NGINX JavaScript). Current stable version is 0.7.0, targeting njs ≥ 0.7.0, with peer dependency on @babel/core ^7.0.0-0. Key differentiator: provides a curated set of Babel plugins for features not yet supported by njs (e.g., classes, for-of, object rest/spread), while skipping transformations for features njs already supports (e.g., arrow functions, block scoping, destructuring). Ideal for developers writing njs scripts with modern JS syntax.