jip 4: chainspec

[qiweiii]

match jip 4 chainspec format

[codecov]

Codecov Report

Attention: Patch coverage is 70.64220% with 64 lines in your changes missing coverage. Please review.

Project coverage is 80.79%. Comparing base (b6caf63) to head (61caabd).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
Node/Sources/Node/ChainSpec.swift	35.52%	49 Missing ⚠️
Boka/Sources/Generate.swift	0.00%	15 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #342      +/-   ##
==========================================
- Coverage   81.39%   80.79%   -0.61%     
==========================================
  Files         374      374              
  Lines       32447    32581     +134     
==========================================
- Hits        26411    26324      -87     
- Misses       6036     6257     +221     

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