[TASK] composer require rector/rector:"~0.7" --dev

Used commands:

    composer remove rector/rector --dev
    composer require rector/rector:"~0.7" --dev

Since updating phpstan to version 0.12.10, rector failed to
run properly. Also, the updated version of rector brings a
couple of bugfixes and new features.

Releases: master
Resolves: #90383
Change-Id: I29d66c5e34db594fbcf24949c61e6db85cecae1b
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63260


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Daniel Goerz <daniel.goerz@posteo.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Daniel Goerz <daniel.goerz@posteo.de>