Fix handling of unverifiable and condition

[mrbean-bremen]

• caused false positives
• fixes Coding Scheme Version erroneously seen as required #32

[codecov-commenter]

Codecov Report

Merging #34 (45afd1e) into main (6bebe1e) will increase coverage by 0.49%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   87.62%   88.11%   +0.49%     
==========================================
  Files          14       14              
  Lines        1471     1473       +2     
==========================================
+ Hits         1289     1298       +9     
+ Misses        182      175       -7     

Files Changed	Coverage Δ
dicom_validator/spec_reader/condition_parser.py	98.84% <100.00%> (+<0.01%)	⬆️

... and 1 file with indirect coverage changes

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