Right now we are using (since Sep 2022, see MDL-75776), mink-phpwebdriver 1.0.1.

Since then, a couple of releases have happened, with the latest one (1.2.1) fixing some php81 incompatibility issues, see (thanks marina!):

https://github.com/oleg-andreyev/MinkPhpWebDriver/releases/tag/v.1.2.1

So this issue is about just bump that dependency for 4.1 and up, so it runs smoothly with php81. So far, that's the only dependency in the whole composer stuff needing an update.

All the .lock files will be generated following the instructions in the docs.

Note that this is being applied to all branches (supported and security), because we always apply all the composer changes to them, given they are related with testing 100%.