fix: nested metadata not respected. closes #171

[marcosschroh]

No description provided.

[codecov]

Codecov Report

Merging #172 (a39e8ad) into master (d88afb8) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #172   +/-   ##
=======================================
  Coverage   99.65%   99.65%           
=======================================
  Files          10       10           
  Lines         869      869           
  Branches      151      151           
=======================================
  Hits          866      866           
  Misses          2        2           
  Partials        1        1           

Impacted Files	Coverage Δ
dataclasses_avroschema/fields.py	99.56% <100.00%> (ø)
dataclasses_avroschema/utils.py	100.00% <100.00%> (ø)

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