Support errors in the RFC 7807-compliant format

[AlekseyMartynov]

Close #426

[codecov-commenter]

Codecov Report

Base: 97.29% // Head: 97.30% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (b40efe0) compared to base (7a964ef).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #564   +/-   ##
=======================================
  Coverage   97.29%   97.30%           
=======================================
  Files          55       55           
  Lines        2220     2228    +8     
=======================================
+ Hits         2160     2168    +8     
  Misses         60       60           

Impacted Files	Coverage Δ
js/dx.aspnet.data.js	94.61% <100.00%> (+0.27%)	⬆️

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