Update gits-common and dependencies

From gits-common created by [ZombieAlienRobot](https://github.com/ZombieAlienRobot): IT-REX-Platform/gits-common#28  

## Description
According to Niklas, other dependencies (spring, gradle) are outdated.
Maybe extract some common dependencies into gits common. (maybe not needed) 

## Acceptance Criteria
- [ ] dependencies updated
- [ ] dependencies extracted