fix: handle array in formatting helpers + tests

[atymic]

Closes #339

[codecov]

Codecov Report

Merging #341 (5f27e10) into main (6761cda) will increase coverage by 0.91%.
The diff coverage is 56.25%.

@@             Coverage Diff              @@
##               main     #341      +/-   ##
============================================
+ Coverage     33.58%   34.50%   +0.91%     
- Complexity      354      357       +3     
============================================
  Files            31       31              
  Lines           789      800      +11     
============================================
+ Hits            265      276      +11     
  Misses          524      524              

Impacted Files	Coverage Δ	Complexity Δ
src/ApiV1/Traits/FormattingHelpers.php	16.41% <56.25%> (+16.41%)	21.00 <3.00> (+3.00)

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