chore: improve getResponseData

[Uzlopak]

first #711 should be merged, than I want to see if there is some aspects regarding resilience.

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[Uzlopak]

@gr2m
@wolfy1339
Do we need to support browsers? In Nodejs we have MIMEType class, and we can use it as a reliable content type parser. But if we need browser support we could e.g. use fast-content-type-parser (made by me and used in fastify).

[wolfy1339]

The whole Octokit ecosystem (apart from some exceptions) has browser support.

[Uzlopak]

@wolfy1339

I introduced the package fast-content-type-parse. It is a package I wrote myself, as I mentioned before. It is imho more reliable than using regexes. We use it in fastify. Using safeParse to not throw errors if the content type is invalid. The chance is imho slim.

Also i think i made it more resilient, because it has no chance to throw anymore ;).