Grab bag of minor changes

[ararslan]

This PR includes multiple distinct commits, two of which upstream local Nabla changes:

1. Extend inv from Base instead of defining a new one
2. Implement exp10 for Dual (taken from a change made in Nabla)
3. Extend value and epsilon to normal numbers (taken from a change made in Nabla)
4. Fix coverage submission for the Pkg3 new world order

Will's authorship has been preserved for the Nabla commits, so please do not squash the commits.

[ararslan]

Thanks! Would you be willing to tag a new release, @dlfivefifty?

[dlfivefifty]

Sure.

I'm not sure who's "in charge" of maintaining this package, but maybe we could get you added? @mlubin I don't have enough rights to do that so could you add @ararslan?

[mlubin]

@dlfivefifty I granted you admin access.

[dlfivefifty]

Thanks! I've added @ararslan as a collaborator, feel free to tag a release when ready.

[ararslan]

Thank you both!