fix: Correctly handle void elements

[paveldedik]

• Ref: Elements with no children "eating" following elements #54

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.94%. Comparing base (9ffa2c8) to head (97fa4eb).

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Additional details and impacted files

@@            Coverage Diff             @@
##             main      #55      +/-   ##
==========================================
+ Coverage   94.92%   94.94%   +0.01%     
==========================================
  Files          42       42              
  Lines        2583     2593      +10     
==========================================
+ Hits         2452     2462      +10     
  Misses        131      131              

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