bump version to 2.0.0-m2
bump version to 2.0.0-m2

Co-authored-by: Stefan Lier <14a935f5678d942f30f15ee6bab6f97f743d89aa@otto.de>
Co-authored-by: Micha Regel <5990655486e7cfbf9f9bf0ad2711a9c0715c4623@otto.de>

otto-de/edison-microservice,otto-de/edison-microservice,otto-de/edison-microservice,otto-de/edison-microservice