infra(unicorn): require-array-join-separator

[ST-DDT]

Ref: #2439

• Check eslint-plugin-unicorn rules to enable/configure/disable #2439

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Enables the unicorn/require-array-join-separator lint rule.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.95%. Comparing base (cb024e8) to head (d7822e6).

Additional details and impacted files

@@            Coverage Diff             @@
##             next    #2813      +/-   ##
==========================================
- Coverage   99.96%   99.95%   -0.01%     
==========================================
  Files        2971     2971              
  Lines      212619   212619              
  Branches      948      597     -351     
==========================================
- Hits       212534   212530       -4     
- Misses         85       89       +4     

see 2 files with indirect coverage changes