v0.2.2 — fix UMD bundle in browser and require modes

Fixed

• UMD bundle broken in both browser and require modes — The UMD wrapper enclosed esbuild's CJS output without neutralizing its internal module.exports = assignment or capturing a return value. In a browser <script> the bare module.exports threw ReferenceError: module is not defined before the global was ever assigned; under require() the factory wrote to the real module then returned undefined, which the wrapper assigned back over the exports. The factory now gets its own CommonJS shim (var module = { exports: {} }) and returns module.exports, so AMD, CJS, and browser-global modes all work.