Fix publishing of logging-testlib module

[alexander-yevsyukov]

This PR applies spinePublishing block to the logging-testlib module so that it is published in a custom way via kmp-publish script plugin.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 14.16%. Comparing base (f9a91c6) to head (73bd7ce).
⚠️ Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #137   +/-   ##
=========================================
  Coverage     14.16%   14.16%           
  Complexity      119      119           
=========================================
  Files           102      102           
  Lines          2443     2443           
  Branches        381      381           
=========================================
  Hits            346      346           
  Misses         2065     2065           
  Partials         32       32           

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