Update the Engine to Camunda Version 7.12

[rfelber]

Is your feature request related to a problem? Please describe.
The current Camunda version of the engine is 7.10. It should be updated to the newest version 7.13 for stability and security reasons.

Describe the solution you'd like

Find more informations here:

• https://docs.camunda.org/manual/latest/update/minor/710-to-711/
• https://docs.camunda.org/manual/latest/update/minor/711-to-712/
• https://docs.camunda.org/manual/latest/update/minor/712-to-713/

Describe alternatives you've considered
There are not really alternatives.

Additional context
None