UMD Universal Module Definition Wrapper

The `umd` package, currently at version 3.0.3, provides a specialized utility for wrapping JavaScript modules with Universal Module Definition (UMD) boilerplate. It is primarily designed for integration into automated build systems, enabling developers to convert their proprietary or standard modules into a format compatible with a wide array of JavaScript environments, including Asynchronous Module Definition (AMD) loaders, CommonJS environments (like Node.js), and traditional browser global script tags. The library supports two primary input formats: a 'return style' module, where the module's export is the direct result of a `return` statement, and CommonJS-style modules which require an explicit `commonJS: true` option. A key differentiator is its synchronous operation and its focus on preventing naming conflicts between multiple UMD modules on the same page. The package offers functions to generate the UMD prelude, postlude, or to wrap an entire module source string. While UMD was crucial for cross-environment compatibility, its necessity has somewhat diminished with the widespread adoption of native ECMAScript Modules (ESM) in modern environments.