issues when using the JSON option

[Shark1337]

I'm encountering some issues when using the JSON option that cause the application to get erroneous responses due to the format in which it adds them, here's an example:

python3 xsstrike.py -u www.example.com --headers --data '{"name": "query"}' --json --proxy

I get the following result in the injection

"{"name": "<test/o%00nload=x"}

when it should be

{"name": "<test/o%00nload=x"}

Thank you for this wonderful application and for your efforts in improving it.