Difference from generational-arena and maintenance status
The readme says it's a fork but doesn't explain the reason or differences. I can see that Index has a type associated with it but there have been other commits on top of that. To save time for anyone considering your crate, could you list the differences from generational-arena in your readme?
Is there a reason this needs to be a separate crate? Since most of the internals are the same, couldn't the original crate just expose this as an additional type? Would the original authors be interested?
Finally, generational-arena has had commits since the fork but i don't see them integrated into this crate - is it still maintained?