Add JSON tests based on https://github.com/nst/JSONTestSuite
Add JSON tests based on https://github.com/nst/JSONTestSuite

dom96/Nim,russpowers/Nim,tulayang/Nim,dom96/Nim,dom96/Nim,russpowers/Nim,tulayang/Nim,russpowers/Nim,russpowers/Nim,tulayang/Nim,russpowers/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,tulayang/Nim,dom96/Nim,tulayang/Nim,dom96/Nim,tulayang/Nim,dom96/Nim