v4.0.0

[danielrbrowne]

This PR:

• Prepares for the v4.0.0 release

[codecov-commenter]

Codecov Report

Merging #174 (cb9c235) into master (c6b143e) will increase coverage by 0.43%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #174      +/-   ##
==========================================
+ Coverage   89.67%   90.10%   +0.43%     
==========================================
  Files          58       58              
  Lines        2972     2972              
==========================================
+ Hits         2665     2678      +13     
+ Misses        307      294      -13     

Impacted Files	Coverage Δ
Tests/Unit/Models/SDKTests.swift	100.00% <100.00%> (ø)
Sources/Services/ServerSyncProcessHandler.swift	82.60% <0.00%> (+1.97%)	⬆️
Sources/Models/ServerSyncJob.swift	74.22% <0.00%> (+8.24%)	⬆️

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