Update version to 2.0b1-dev
Update version to 2.0b1-dev

normanjaeckel/OpenSlides,CatoTH/OpenSlides,tsiegleauq/OpenSlides,rolandgeider/OpenSlides,boehlke/OpenSlides,ostcar/OpenSlides,CatoTH/OpenSlides,jwinzer/OpenSlides,normanjaeckel/OpenSlides,rolandgeider/OpenSlides,boehlke/OpenSlides,normanjaeckel/OpenSlides,OpenSlides/OpenSlides,emanuelschuetze/OpenSlides,jwinzer/OpenSlides,emanuelschuetze/OpenSlides,boehlke/OpenSlides,emanuelschuetze/OpenSlides,FinnStutzenstein/OpenSlides,tsiegleauq/OpenSlides,CatoTH/OpenSlides,jwinzer/OpenSlides,jwinzer/OpenSlides,CatoTH/OpenSlides,FinnStutzenstein/OpenSlides,jwinzer/OpenSlides,OpenSlides/OpenSlides,ostcar/OpenSlides,FinnStutzenstein/OpenSlides,boehlke/OpenSlides,emanuelschuetze/OpenSlides,normanjaeckel/OpenSlides,tsiegleauq/OpenSlides,FinnStutzenstein/OpenSlides,rolandgeider/OpenSlides,ostcar/OpenSlides