fix build config

rollup.config.browser.js

@@ -1,3 +1,4 @@
+import { readFileSync } from 'fs';
 import config from './rollup.config.js';
 
 config.plugins.push({

rollup.config.js

@@ -39,5 +39,6 @@ export default {
 	],
 	external: [ 'fs' ],
 	banner: banner,
-	sourceMap: true
+	sourceMap: true,
+	moduleName: 'rollup'
 };