[BUG][Typescript] Add 'constructor' to the list of reserved words since a field of that name is not allowed in typescript classes

Created by: MustansirS

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When generating a Typescript client from specs where API responses have a field named constructor defined, the generated model file corresponding to the Response object contains the following error: Classes may not have a field named 'constructor'.

openapi-generator version

6.2.0

OpenAPI declaration file content or url

tsbug.yaml:

openapi: 3.0.2
info:
  title: Test API
  version: '0.0'
  contact:
    name: Curvegrid
  description: Test API.
servers:
  - url: 'https://localhost:8080'
tags:
  - name: tests
paths:
  /tsbug:
    get:
      operationId: test-bug
      summary: Test bug
      description: A test endpoint for the typescript bug.
      tags:
        - tests
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TestResponse'
components:
  schemas:
    TestResponse:
      title: TestResponse
      type: object
      description: The response object for the test endpoint.
      properties:
        constructor:
          type: string
      required:
        - constructor

Generation Details

Steps to reproduce

openapi-generator generate -g typescript -i tsbug.yaml -o typescript_client

Related issues/PRs

Suggest a fix

Add constructor to the list of reserved words for the typescript client.