feat: 完善additionalProperties处理，补充测试用例

[HUxiaoAlinNG]

No description provided.

[codecov-commenter]

Codecov Report

Merging #11 (21124fc) into master (c94dca2) will increase coverage by 0.26%.
The diff coverage is 100.00%.

❗ Current head 21124fc differs from pull request most recent head 1e3fe87. Consider uploading reports for the commit 1e3fe87 to get more accurate results

@@            Coverage Diff             @@
##           master      #11      +/-   ##
==========================================
+ Coverage   94.77%   95.03%   +0.26%     
==========================================
  Files           3        3              
  Lines         765      766       +1     
  Branches      275      276       +1     
==========================================
+ Hits          725      728       +3     
+ Misses         40       38       -2     

Impacted Files	Coverage Δ
src/get-jsonschema-from-data.ts	96.05% <100.00%> (+0.57%)	⬆️

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