Please consider remove Jackson from ktor-openapi-generator

[cuong0993]

Hi Lukas,

Can you consider removing Jackson from your library? (Jackson is currently used in testing in the library)
https://github.com/LukasForst/ktor-openapi-generator

I think converting map to JSON in the library can be done manually like this.
Kotlin/kotlinx.serialization#296 (comment).

Removing helps users choose multiple option alternatives to Jackson.
I am trying to use io.ktor:ktor-serialization-kotlinx-json instead of Jackson but the ktor-openapi-generator did not work with io.ktor:ktor-serialization-kotlinx-json.

[LukasForst]

Hi,
please see papsign/Ktor-OpenAPI-Generator#42 for kotlinx.serialization support. I'm not using kotlinx, so I can't directly say how hard is that or not. However, I'm open to PRs that would make this project more generic!