fix code smells

Author: EmilianoSanchez

rollup.ci.config.js

@@ -3,7 +3,7 @@ import terser from '@rollup/plugin-terser';
 
 export default env => {
 
-  const fileName = (outputSuffix) => `split-browser-${env.branch !== 'main' ? `dev-${VERSION}` : VERSION}${outputSuffix ? `.${outputSuffix}` : ''}`;
+  const fileName = (outputSuffix) => `split-browser-${env.branch !== 'main' ? 'dev-' + VERSION : VERSION}${outputSuffix ? '.' + outputSuffix : ''}`;
 
   const createRollupConfig = (input, outputSuffix) => ({
     input,