Allow multiple trackers for a single component type #375
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This PR introduces a flag type in
ChangeTracker(fromChangeTracker<Component>toChangeTracker<Component, Flag>) to allow multiple trackers for a single component type.I wanted to track a component type from different areas of my project, so I added this change. This is obviously a breaking change.
On a related note, it would be interesting to track removed components from deleted entites, though that's a difficult task to tackle.
Thanks for this great crate!