增加Pick/Omit对type 联合类型的支持

[HUxiaoAlinNG]

1.泛型默认值，进行深度克隆，避免被串改
2.增加Pick/Omit对type 联合类型的支持
3.补充测试用例

[codecov-commenter]

Codecov Report

Merging #12 (46f2a9e) into master (c94dca2) will increase coverage by 0.39%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #12      +/-   ##
==========================================
+ Coverage   94.77%   95.16%   +0.39%     
==========================================
  Files           3        3              
  Lines         765      765              
  Branches      275      277       +2     
==========================================
+ Hits          725      728       +3     
+ Misses         40       37       -3     

Impacted Files	Coverage Δ
src/get-jsonschema-from-data.ts	96.32% <100.00%> (+0.84%)	⬆️
src/typescript-to-file-datas.ts	93.93% <100.00%> (ø)

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