 chore(release): Prepare release: set version to 7.4.0-alpha2
 chore(release): Prepare release: set version to 7.4.0-alpha2

tcrossland/camunda-bpm-webapp,kingtec/camunda-tasklist-ui,TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,kingtec/camunda-tasklist-ui,tcrossland/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp,tcrossland/camunda-bpm-webapp,TitanUser/camunda-bpm-webapp,xlinur/camunda-bpm-webapp