fix: add support for url parameters

[dannyifang]

URL query params in schema are not supported and is automatically replaced with 'path' and marked as 'required' in the helper function.

fastify.get('/some-secrete-route/:id', {
  schema: {
    hide: true,
    params: {
      type: 'object',
      properties: {
        id: {
          type: 'string',
          description: 'user id'
        }
        urlParam: {
          in: 'query',
          type: 'string',
          description: 'optional url parameter'
        }
      }
    },
    response: {
      201: {
        description: 'Successful response',
        type: 'object',
        properties: {
          hello: { type: 'string' }
        }
      }
    },
  }
}, (req, reply) => {})
'''

Updated helper.js to account for param types that aren't paths.

[harveyconnor]

Also solves
#33

[dannyifang]

Fix for #33 not in this request

[harveyconnor]

kk lgtm

[SkeLLLa]

Could you please add some tests to be sure that all's working well? I'm not sure if fastify supports query string parameters declared in this way.

[dannyifang]

I've added the test in genPaths

[SkeLLLa]

v3.0.2