Update shred to 0.16.0

[Imberflur]

Also hide optional uuid dep from features since it is enabled indirectly via uuid_entity feature (and not intended to be enabled directly)

Checklist

• I've added tests for all code changes and additions (where applicable)
• I've added a demonstration of the new feature to one or more examples
• I've updated the book to reflect my changes
• Usage of new public items is shown in the API docs

API changes

This is a breaking change.

The SystemData derive now requires shred to be in scope rather than all the individual types that the derive needs.