Fixes Key Error exception when searching

[coordt]

• Added a test for the reported bug
• Fixes Version-less search & replace raise KeyError: 'new_version' exception #70

[github-actions]

Version hint: patch
Current version: 0.15.0
New version (when merged): 0.15.1

_{Comment ID: Display the version hint-auto-generated}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (fa2ff4c) 92.96% compared to head (6e1d63f) 93.05%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #106      +/-   ##
==========================================
+ Coverage   92.96%   93.05%   +0.09%     
==========================================
  Files          19       19              
  Lines        1250     1252       +2     
  Branches      257      257              
==========================================
+ Hits         1162     1165       +3     
+ Misses         59       58       -1     
  Partials       29       29              

Flag	Coverage Δ
python-3.10	93.05% <100.00%> (+0.09%)	⬆️
python-3.11	93.05% <100.00%> (+0.09%)	⬆️
python-3.8	93.05% <100.00%> (+0.09%)	⬆️
python-3.9	93.05% <100.00%> (+0.09%)	⬆️

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