fix: fix default import in CommonJS

Closes #539

Author: jonahsnider

packages/convert/rollup.config.js

@@ -35,6 +35,7 @@ const terserConfig = {
 		toplevel: true,
 		properties: {
 			regex: /^_/,
+			reserved: ['__esModule'],
 		},
 	},
 	module: false,

packages/convert/src/entry.ts

@@ -1,2 +1,4 @@
 // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-require-imports, n/prefer-global/process
 module.exports = require(process.env.NODE_ENV === 'development' ? './convert.dev.js' : './convert.prod.js');
+// Required to make TypeScript's __importDefault() helper work in CommonJS
+Object.defineProperty(exports, '__esModule', {value: true});