fix(build): enforce __esModule interop for cjs builds

rollup.config.mjs

@@ -104,6 +104,7 @@ function createConfig(format, output, plugins = []) {
   const isCompatBuild = !!packageOptions.compat
 
   output.exports = isCompatPackage ? 'auto' : 'named'
+  output.esModule = true
   output.sourcemap = !!process.env.SOURCE_MAP
   output.externalLiveBindings = false