Support of parameters refs in operation level and path-level in DELETE requests

[andriyor]

Describe the bug

➜ restful-react import --file example.yaml --output generated.tsx
Error: The path params id can't be found in parameters (GetUserById)

example file

openapi: 3.0.1
info:
  title: user API
  version: 1.0.0
paths:
  /user/{id}:
    parameters:
      - $ref: '#/components/parameters/id'
    delete:
      operationId: GetUserById
      parameters:
        - $ref: '#/components/parameters/bearer'
      responses:
        '200':
          description: OK
components:
  parameters:
    bearer:
      name: bearer
      in: header
      description: JWT Bearer token
      required: false
      schema:
        type: object
    id:
      name: id
      in: path
      description: User ID.
      required: true
      schema:
          type: string

To Reproduce
Steps to reproduce the behavior:

Run restful-react import --file example.yaml --output generated.tsx

Expected behavior
No errors.

Desktop (please complete the following information):

• OS: Ubuntu
• Library: v15

[andriyor]

similar issue #259