chore: moddable 7abc931d 2021-03-19 XS: 608 (weak maps)

[dckc]

again, semi-automated #2648

fixes #2670
I checked: Moddable-OpenSource/moddable#608 (comment)

[dckc]

oops...

[dckc]

there.

[erights]

What should one think about to review this?

In my ignorance, LGTM

[warner]

I certainly don't know enough about their codebase to pass judgement.. I'm entirely at their mercy. I look for consistency in the changes that were made, and I treat it as an opportunity to see that some functional area was modified in some way. E.g. from the diffs I can tell that WeakMaps are doing something different (so yay maybe it fixes our bug), some sort of stack-size limit is being computed or maybe enforced (so yay progress towards some of our metering goals), and a number of places that were assuming a chunk size of 1 are now accepting a configurable chunk size, so some sort of memory allocation thing is becoming more generic. Not much for me to approve or disapprove, but it acts a bit like a ChangeLog of the upstream sources, which is nice to be aware of.

[warner]

No problems jump out at me.