Document some parameters for JSON.writeJSON

[linuswagner]

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 49%. Comparing base (39f96ec) to head (a646235). Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##              main   #1922   +/-   ##
=======================================
  Coverage       49%     49%           
- Complexity    6161    6163    +2     
=======================================
  Files          661     661           
  Lines        58698   58701    +3     
  Branches      8547    8548    +1     
=======================================
+ Hits         28958   28962    +4     
- Misses       27549   27551    +2     
+ Partials      2191    2188    -3     

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[jurgenvinju]

Thanks @linuswagner