Handle class was renamed to HandleElem but not all references were updated

[patrickhuber]

I think commit 05cef2e changed the Handle class to HandleElem but not all references were updated.

I noticed that even with this change, the CI still passed. Is there enough code coverage to ensure this would have been caught?

[lukewagner]

Thanks! At the moment, mostly b/c I'm a Python n00b, we're not running Python in the type-checking mode, so all the type annotations are purely documentative atm.

[patrickhuber]

Could you also make the same change in CanonicalABI.md?

Yes, one moment

[patrickhuber]

Done

[lukewagner]

Thanks!