fix(httpless): json stringify aws body

[cncolder]

No description provided.

[codecov]

Codecov Report

Merging #24 into master will increase coverage by 0.12%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #24      +/-   ##
==========================================
+ Coverage   63.42%   63.55%   +0.12%     
==========================================
  Files          14       14              
  Lines         566      568       +2     
  Branches      120      122       +2     
==========================================
+ Hits          359      361       +2     
  Misses        203      203              
  Partials        4        4

Impacted Files	Coverage Δ
httpless/response.ts	93.54% <100%> (+0.32%)	⬆️
microless/index.ts	89.18% <100%> (-0.15%)	⬇️

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