Fix additionalProperties.oneOf

[drwpow]

Fixes #305

[codecov]

Codecov Report

Merging #442 (e244b70) into main (5fae654) will increase coverage by 0.53%.
The diff coverage is 93.54%.

@@            Coverage Diff             @@
##             main     #442      +/-   ##
==========================================
+ Coverage   93.56%   94.09%   +0.53%     
==========================================
  Files           5        5              
  Lines         264      288      +24     
  Branches       86       96      +10     
==========================================
+ Hits          247      271      +24     
- Misses         13       15       +2     
+ Partials        4        2       -2     

Impacted Files	Coverage Δ
src/v3.ts	97.38% <93.54%> (+0.48%)	⬆️

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