made some dependencies optional, install via `pip install wetb[prepost]` to install with dependencies needed by prepost or `pip install wetb[all]` to install with all dependencies
The Gitlab server is succesfully updated to version 17.9.2
made some dependencies optional, install via `pip install wetb[prepost]` to install with dependencies needed by prepost or `pip install wetb[all]` to install with all dependencies