feat: support conditional type and infer type

[ikatyang]

No description provided.

[codecov-io]

Codecov Report

Merging #94 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #94   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          92     96    +4     
  Lines        1189   1224   +35     
  Branches      180    182    +2     
=====================================
+ Hits         1189   1224   +35

Impacted Files	Coverage Δ
src/parse.ts	100% <100%> (ø)	⬆️
src/types/infer-type.ts	100% <100%> (ø)
src/parsers/conditional-type.ts	100% <100%> (ø)
src/types/conditional-type.ts	100% <100%> (ø)
src/transform.ts	100% <100%> (ø)	⬆️
src/parsers/infer-type.ts	100% <100%> (ø)

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