Crash if invalid JSON is returned

[JacenBoy]

node-kitsu seems to assume that the Kitsu API will always return a proper JSON response. If the API does not return a proper JSON response, a syntax error is thrown during the parsing of the response.

I am currently using async/await syntax wrapped in a try/catch, and the syntax error seems to occur outside of my try/catch, causing the app to crash.

The issue can be recreated if a request is made while Kitsu is experiencing some kind of downtime. Rather than a JSON response, the API returns an HTML error page, causing the issue.