Update spring-flo-si sample to new Angular version

[MaRoe]

Is there any chance you have the "update spring-flo-si sample to Angular 5" on your roadmap?

[BoykoAlex]

Don't think we were explicitly having this planned, but we can definitely do it :-)
Lets keep this issue opened to track it

[deefdragon]

The documentation & versioning could use an update in general.