feat: support conversion in fastjson

[Yisaer]

No description provided.

[codecov]

Codecov Report

Patch coverage: 62.07% and project coverage change: +0.03 🎉

Comparison is base (c0ba4d5) 60.07% compared to head (74b8b4d) 60.10%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1962      +/-   ##
==========================================
+ Coverage   60.07%   60.10%   +0.03%     
==========================================
  Files         274      274              
  Lines       31223    31314      +91     
==========================================
+ Hits        18755    18819      +64     
- Misses      10586    10614      +28     
+ Partials     1882     1881       -1     

Impacted Files	Coverage Δ
internal/converter/json/converter.go	59.12% <62.07%> (-0.80%)	⬇️

... and 6 files with indirect coverage changes

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[ngjaying]

There is a strictValidation property when creating a stream. Maybe we need to handle both true/false for that property in another PR.

[ngjaying]

case "string", "bytea", why the code are the same. There are actually different types. bytea is expected to be []byte.

[Yisaer]

case "string", "bytea", why the code are the same. There are actually different types. bytea is expected to be []byte.

updated.