fix: Array parsing in new config

[kuznetsss]

Improving array parsing in config:

• Allow null values in arrays for optional fields
• Allow empty array even for required field
• Allow to not put an empty array in config even if array contains required fields

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.95%. Comparing base (427ba47) to head (e62a02c).
Report is 10 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1896      +/-   ##
===========================================
+ Coverage    72.71%   72.95%   +0.23%     
===========================================
  Files          333      335       +2     
  Lines        13525    13676     +151     
  Branches      6881     6944      +63     
===========================================
+ Hits          9835     9977     +142     
- Misses        1785     1787       +2     
- Partials      1905     1912       +7     

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[PeterChen13579]

Looks good just a few nits 👍 🚀

[PeterChen13579]

LGMT