Add support for kebab-string-casing parameters

[christianhelle]

The changes here fix the missing support for using kebab-string-casing in path parameters

The following OpenAPI spec:

openapi: "3.0.0"
info:
  version: "v1"
  title: "Test API"
servers:
  - url: "https://test.host.com/api/v1"
paths:
  /jobs/{job-id}:
    get:
      tags:
      - "Jobs"
      summary: "Get job details"
      description: "Get the details of the specified job."
      parameters:
        - in: "path"
          name: "job-id"
          description: "Job ID"
          required: true
          schema:
            type: "string"
      responses:
        "200":
          description: "successful operation"
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/JobResponse"
components:
  schemas:
    JobResponse:
      type: "object"
      properties:
        job:
          type: "object"
          properties:
            start-date:
              type: "string"
              format: "date-time"
            details:
              type: "string"

Generates the following code:

/// <summary>
/// Get the details of the specified job.
/// </summary>
[Get("/jobs/{jobId}")]
Task<JobResponse> Jobs(string jobId);

This resolves #10 reported by @m7clarke