support --options flag in generate-swagger

[gi-jacob]

Checklist

• [x] run npm run test and npm run benchmark
• [ ] tests and/or benchmarks are included
• [ ] documentation is changed or added
• [x] commit message and code follows the Developer's Certification of Origin and the Code of conduct

[gi-jacob]

Oh gosh, please write a comprehensive PR description next time

This fix relates to #687 and it propagates the same fix to the generate swagger command because if you write generate-swagger --options it is ignored.

It is not clear to me why this option is needed: this command spins up a fastify (without listening) and it generates the swagger. Whatever hooks and additional configurations should not matter.

Could you help me with an example? In case, could you add a test in the test/generate-swagger.test.js file?

Sure, I have custom keywords defined for the ajv schemas I use. In order for the generate-swagger command to work I need to pass ajv options to fastify. Without this the schemas fail validation and the swagger output fails to generate.

[Eomm]

Ok, thanks for helping me

Would you mind to add a test? Without it we can't garantee to remove this feature accidentally in future