Changes to Get commit results at a specified height

removed the required property result/signed_header/header/voters_hash from the response with the 200 status

added the required property result/signed_header/header/next_validators_hash to the response with the 200 status

added the required property result/signed_header/header/validators_hash to the response with the 200 status

removed the required property result/signed_header/header/next_validators_hash from the response with the 200 status

removed the required property result/signed_header/header/validators_hash from the response with the 200 status

added the required property result/signed_header/header/voters_hash to the response with the 200 status