Babel ES2015 Rollup Preset

This package is a Babel preset specifically designed for use with Rollup, building upon `babel-preset-es2015`. Its primary function was to modify the standard ES2015 preset by disabling the transformation of ES module syntax to CommonJS (as Rollup handles ES modules natively) and enabling the `babel-plugin-external-helpers` to prevent helper code duplication. The latest version is 3.0.0, published nearly a decade ago. It is no longer actively maintained, and its base `babel-preset-es2015` has been deprecated since Babel v6 in favor of `@babel/preset-env`. Developers should migrate to modern Babel setups using `@babel/preset-env` with `@rollup/plugin-babel` for contemporary build workflows.