Make Crunchy to properly return a return code when running fine or failing

src/cli.ts

@@ -6,5 +6,8 @@ batch(process.argv, (err: any) =>
   if (err)
   {
     console.error(err.stack || err);
+    process.exit(-1)
   }
+  console.info("Done!")
+  process.exit(0)
 });