Update addAuthenticationHeader usage where used (Composer 2.9 update)

[asgrim]

Seems that composer/composer#12406 is introducing a new addAuthenticationOptions method (to replace addAuthenticationHeader) which adds support for authenticating using a client cert. This is currently scheduled for Composer 2.9 (tbc)

Check into our codebase and update to use the new method when upgrading to Composer 2.9

[rtm-ctrlz]

As an author of those changes I made a fork of php/pie with a branch containing updated AuthHelper usage, there is a commit rtm-ctrlz/php-pie@165f7d2.
I don't think that right now there is a need for a PR, because those changes are not approved yet, but as soon as they will be accepted - be sure I will make a PR or you could use that commit as some kind of reference.

[asgrim]

As an author of those changes I made a fork of php/pie with a branch containing updated AuthHelper usage, there is a commit rtm-ctrlz/php-pie@165f7d2. I don't think that right now there is a need for a PR, because those changes are not approved yet, but as soon as they will be accepted - be sure I will make a PR or you could use that commit as some kind of reference.

That is very helpful, and a PR when ready will be great 👍 thank you!