Managing Flex, extra.symfony.require & Version Constraints > Upgrading & What's New in Symfony 5! | SymfonyCasts
Composer | PHP Tools for Visual Studio Documentation
How to solve Composer Install/Update error: Return value of PackageVersions\ Installer::activate() must be an instance of PackageVersions\void, none returned | Our Code World
How to Install Composer - Explained - YouTube
How to remove a package from PHP composer? - Linux Shout