#### 📖 Summary
- update Pester tests to Pester5+ compatiple layout
- switch to dotnet base imaged
- dotnet binary required for publishung powershell modules (Publish-Module)
#### 📑 Test Plan
> 💡 Select your test plan for the code changes.
- [x] Tested via Drone.io pipeline
- [ ] Custom test
- [ ] No test plan
##### Details / Justification
<!-- Add your test details or justification for missing tests here. -->
#### 📚 Additional Notes
<!-- A place for additional detail notes. -->
Co-authored-by: OCram85 <marco.blessing@googlemail.com>
Reviewed-on: OCram85/PSCredentialStore#59
