npm cmd bug fixes

src/commands/npm.ts

@@ -19,7 +19,7 @@ export default class NPM extends Command {
 
       const res = await axios.get(`https://registry.npmjs.com/${args[0]}`, { validateStatus: (_) => true });
 
-      if (res.status === 404) this.error(message.channel, 'Could not find the library, try something else.');
+      if (res.status === 404) return this.error(message.channel, 'Could not find the library, try something else.');
 
       const { data } = res;