How to update a composer project?

Question

Composer

Hello.
Created a new project with the command:

composer create-project laravel/laravel:"v5.3.0" myproject

After some manipulations and research, I want to update it using composer:
composer update
Naturally, only the dependencies described in composer.json were updated, but laraver itself was not updated.

Package "laravel/laravel" listed for update is not installed. Ignoring.

What am I doing wrong. Or how do I update the composer project to the latest version?
Forgive me if the question seems lamer to someone. Laravel is just an example here, I'm studying composer.

Answer 1

Specify the required version of Laravel in composer.json and run composer update again

Answer 2

To update, changing the version in the composer and updating is not enough.
https://laravel.com/docs/5.4/upgrade
Yes. Project at its core. He's not a vendor. Vendors are package providers. In our case, vendors are developers. <vendor>/<package>
The project is your business logic that you write.