All system extensions should have a dependency on
"typo3/cms-core" with a fixed version set to "9.0.0".

Additionally, EXT:core ("typo3/cms-core") needs to have all
dependencies of the root composer.json in order
to work as standalone composer package.

Releases: master
Resolves: #83270
Change-Id: Iaf0e925b46548914dcd0ffff49aedf5fc89107b6
Reviewed-on: https://review.typo3.org/55000


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Tested-by: Stefan Neufeind <typo3.neufeind@speedpartner.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>