Remove impl trait from parameter positions in Marshaller write methods

[samsarge]

Warning can potentially cause breaking changes when using the BytecodeWrite trait

#133

[codecov]

Codecov Report

Attention: Patch coverage is 57.14286% with 6 lines in your changes missing coverage. Please review.

Project coverage is 61.5%. Comparing base (2fba304) to head (0693535).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/library/marshaller.rs	57.1%	6 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #135   +/-   ##
======================================
  Coverage    61.5%   61.5%           
======================================
  Files          17      17           
  Lines        1073    1073           
======================================
  Hits          660     660           
  Misses        413     413           

Flag	Coverage Δ
rust	61.5% <57.1%> (ø)

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[dr-orlovsky]

ACK 0693535

[dr-orlovsky]

Yes, this is it! Congrats with the first contribution - and thank you for your help!