feat: support dep required for map[any]any

[danielgtaylor]

This was missed in #303, needed to potentially support other formats like CBOR/msgpack/YAML/etc that may create maps where keys may not all be strings. The one caveat is the checked dependent key type will always be a string, but I think that's acceptable for now.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.13%. Comparing base (bd6977a) to head (0341d1a).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #312   +/-   ##
=======================================
  Coverage   95.12%   95.13%           
=======================================
  Files          19       19           
  Lines        2769     2773    +4     
=======================================
+ Hits         2634     2638    +4     
  Misses         98       98           
  Partials       37       37           

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