fix: compact more error response format

[dead-horse]

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[codecov]

Codecov Report

Merging #60 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #60   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines         232    242   +10     
=====================================
+ Hits          232    242   +10

Impacted Files	Coverage Δ
lib/roa.js	100% <100%> (ø)	⬆️

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[JacksonTian]

err.name 需要增强下