chore: allow OBJECT or ARRAY when deserializing VC

[paullatzelsperger]

What this PR changes/adds

sometimes VCs are deserialized as plain JSON, e.g. when obtaining StatusList2021 credentials. The spec says that credentialStatus and credentialSubject
can be either an ARRAY or an OBJECT, so a custom deserialization feature is enabled to allow that.

Why it does that

The StatusList2021 specification (and the VC DataModel, for that matter) demand that.

Further notes

List other areas of code that have changed but are not necessarily linked to the main feature. This could be method
signature changes, package declarations, bugs that were encountered and were fixed inline, etc.

Linked Issue(s)

Closes # <-- insert Issue number if one exists

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[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.68%. Comparing base (7f20ba5) to head (998a9a7).
Report is 203 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4099      +/-   ##
==========================================
+ Coverage   71.74%   74.68%   +2.94%     
==========================================
  Files         919      979      +60     
  Lines       18457    20088    +1631     
  Branches     1037     1131      +94     
==========================================
+ Hits        13242    15003    +1761     
+ Misses       4756     4591     -165     
- Partials      459      494      +35     

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