Allow plain objects for TokenData

[blakeembrey]

There's no real reason to utilize the TokenData class anymore. Keeps it around for backward compatibility, but migrates all documentation to plain objects.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.23%. Comparing base (1bc7e96) to head (81f316d).

Additional details and impacted files

@@                   Coverage Diff                   @@
##           be/debug-original-path     #391   +/-   ##
=======================================================
  Coverage                   99.23%   99.23%           
=======================================================
  Files                           1        1           
  Lines                         391      391           
  Branches                      133      133           
=======================================================
  Hits                          388      388           
  Misses                          3        3           

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