fix(utils): correctly extract publicKeyHex from [Ed/X]25519 2020 keys

[nickreynolds]

What issue is this PR fixing

closes #1067

What is being changed

Add support for 2020 key types in extractPublicKeyHex util function

Quality

Check all that apply:

• I want these changes to be integrated
• I successfully ran yarn, yarn build, yarn test, yarn test:browser locally.
• I allow my PR to be updated by the reviewers (to speed up the review process).
• I added unit tests.
• I added integration tests.
• I did not add automated tests because _________, and I am aware that a PR without tests will likely get rejected.

[codecov]

Codecov Report

Merging #1076 (ec58360) into next (125bf42) will decrease coverage by 0.22%.
The diff coverage is 78.44%.

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #1076      +/-   ##
==========================================
- Coverage   80.25%   80.02%   -0.23%     
==========================================
  Files         118      127       +9     
  Lines        4056     4606     +550     
  Branches      875      999     +124     
==========================================
+ Hits         3255     3686     +431     
- Misses        798      920     +122     
+ Partials        3        0       -3     

[mirceanis]

looks good