The Symfony 4.x dependencies have been added previously to prevent problems with GrumPHP and Symfony 5.x. These problems should be fixed by now.
Requiring 4.x was causing problems because composer would sometimes prefer a newer version of Symfony over the testing suite causing an old version of the testing suite to be installed.
The Symfony 4.x dependencies have been added previously to prevent problems with GrumPHP and Symfony 5.x. These problems should be fixed by now.
Requiring 4.x was causing problems because composer would sometimes prefer a newer version of Symfony over the testing suite causing an old version of the testing suite to be installed.