log error instead of promise rejection

lib/index.ts

@@ -23,4 +23,6 @@ import { Snippet } from './Snippet';
   const runner
   = new (await import (`./snippets/${snippet}/index.js`)).default as Snippet;
   runner.start (process.cwd ());
-}) ();
+}) ()
+  // eslint-disable-next-line no-console
+  .catch ((e) => console.log (e));