Remove the need for json_{de|en}code() in the utils test
Remove the need for json_{de|en}code() in the utils test

remicollet/libsodium-php,thebigb/libsodium-php,thebigb/libsodium-php,remicollet/libsodium-php,jedisct1/libsodium-php,jedisct1/libsodium-php,paragonie/libsodium-php,paragonie/libsodium-php,paragonie/libsodium-php,remicollet/libsodium-php,jedisct1/libsodium-php