fix: warning UnhandledPromiseRejectionWarning not throwing with node < 15

Author: MathieuPuech

.changeset/stale-oranges-report.md

@@ -0,0 +1,5 @@
+---
+'@rocket/cli': patch
+---
+
+fix: warning UnhandledPromiseRejectionWarning not throwing with node < 15

packages/cli/src/cli.js

@@ -4,3 +4,7 @@ import { RocketCli } from './RocketCli.js';
 
 const cli = new RocketCli();
 cli.run();
+
+process.on('unhandledRejection', up => {
+  throw up;
+});