[ticket/11831] Update fabpot/goutte to 1.0.*

PHPBB3-11831
[ticket/11831] getAttribute was replaced with attr

PHPBB3-11831
Merge pull request #1701 from EXreaction/ticket/11831

Update fabpot/goutte
Merge remote-tracking branch 'remotes/upstream/develop-olympus' into develop

* remotes/upstream/develop-olympus:
  [ticket/11831] getAttribute was replaced with attr
  [ticket/11831] Update fabpot/goutte to 1.0.*

Conflicts:
	phpBB/composer.lock