Update cli.js

cli.js

@@ -12,6 +12,13 @@ if (!input) {
   process.exit(1);
 }
 
+if (input === "--manifest") {
+  const manifest = require('./manifest.json');
+  console.log(JSON.stringify(manifest, null, 2));
+  process.exit(0);
+}
+
+
 // Process the signal deterministically
 const result = processSignal(input);