Update Docker image for current Scala (2.12,2.13) versions

[DaniRey]

[DaniRey]

@remo-vonarx why did you choose 2.13.3 instead of 2.13.6?

[remo-vonarx]

@DaniRey This is a mistake from my side - I did not check the current Scala version. I'll deliver a new release with the latest version for Scala 2.12 and 2.13. Keep you posted!

[DaniRey]

Great, thank you