Implement serialization of diff in one go (2th attempt)

[Shatur]

No description provided.

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.86% ⚠️

Comparison is base (bdad669) 96.01% compared to head (3894d9a) 95.15%.
Report is 1 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master      #39      +/-   ##
==========================================
- Coverage   96.01%   95.15%   -0.86%     
==========================================
  Files          10       10              
  Lines         602      619      +17     
==========================================
+ Hits          578      589      +11     
- Misses         24       30       +6     

Files Changed	Coverage Δ
src/lib.rs	100.00% <ø> (ø)
src/client.rs	86.15% <100.00%> (-3.51%)	⬇️
src/replicon_core.rs	98.31% <100.00%> (+0.81%)	⬆️
src/server.rs	97.87% <100.00%> (ø)

... and 2 files with indirect coverage changes

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