feat: SourceString API fix for strings with plural forms

[bhdnb]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 95.65217% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.39%. Comparing base (3ae9950) to head (4588ada).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/CrowdinApiClient/Model/SourceString.php	95.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #206      +/-   ##
============================================
+ Coverage     89.37%   89.39%   +0.03%     
- Complexity     1294     1300       +6     
============================================
  Files           119      119              
  Lines          3393     3411      +18     
============================================
+ Hits           3032     3049      +17     
- Misses          361      362       +1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.