Import test codes for Sisimai::Message::JSON from https://github.com/sisimai/p5-Sisimai/commit/d4d92559b662ca48c69a801ae143fd362c8cb3f3
Import test codes for Sisimai::Message::JSON from https://github.com/sisimai/p5-Sisimai/commit/d4d92559b662ca48c69a801ae143fd362c8cb3f3

azumakuniyuki/rb-Sisimai,azumakuniyuki/rb-Sisimai