Updating unimarshaller

[mfdeveloper508]

#282
#279

[codecov-commenter]

Codecov Report

Attention: 93 lines in your changes are missing coverage. Please review.

Comparison is base (b652df4) 73.70% compared to head (2cb0e9d) 73.60%.
Report is 3 commits behind head on master.

❗ Current head 2cb0e9d differs from pull request most recent head a88931a. Consider uploading reports for the commit a88931a to get more accurate results

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #289      +/-   ##
==========================================
- Coverage   73.70%   73.60%   -0.10%     
==========================================
  Files          43       43              
  Lines        2282     2478     +196     
==========================================
+ Hits         1682     1824     +142     
- Misses        369      413      +44     
- Partials      231      241      +10     

Files	Coverage Δ
test/fuzz-reader/reader.go	55.55% <0.00%> (ø)
field/bitmap.go	69.29% <60.00%> (-1.76%)	⬇️
field/track1.go	69.02% <40.00%> (ø)
field/track2.go	68.22% <40.00%> (ø)
field/track3.go	61.79% <40.00%> (ø)
message.go	74.10% <91.83%> (+2.15%)	⬆️
field/composite.go	80.13% <85.36%> (-1.76%)	⬇️
field/hex.go	72.72% <71.15%> (+4.18%)	⬆️
field/string.go	76.72% <67.92%> (-6.41%)	⬇️
field/binary.go	65.07% <66.66%> (+4.40%)	⬆️
... and 1 more

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[alovak]

Great job!