Fix encoding escaping bugs

[fabianfett]

No description provided.

[codecov]

Codecov Report

Merging #66 into main will increase coverage by 0.34%.
The diff coverage is 98.24%.

@@            Coverage Diff             @@
##             main      #66      +/-   ##
==========================================
+ Coverage   85.57%   85.91%   +0.34%     
==========================================
  Files          13       13              
  Lines        1234     1271      +37     
==========================================
+ Hits         1056     1092      +36     
- Misses        178      179       +1     

Impacted Files	Coverage Δ
Sources/PureSwiftJSON/JSONValue.swift	95.30% <97.50%> (+0.65%)	⬆️
Sources/PureSwiftJSON/Parsing/DocumentReader.swift	91.94% <100.00%> (ø)
Sources/PureSwiftJSON/Parsing/JSONParser.swift	91.36% <100.00%> (ø)

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