fix: build cannot exit (close: #580)

lib/build.js

@@ -93,6 +93,9 @@ module.exports = async function build (sourceDir, cliOptions = {}) {
   const relativeDir = path.relative(process.cwd(), outDir)
   logger.success(`\n${chalk.green('Success!')} Generated static files in ${chalk.cyan(relativeDir)}.\n`)
 
+  // fix: #580 build cannot exit.
+  process.exit(0)
+
   // --- helpers ---
 
   function compile (config) {