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

If parameters names generated in OpenAPI spec are the same as a type in typescript, it will throw errors during build.

openapi-generator version

5.3.0-SNAPSHOT, didn't seems to be a regression

OpenAPI declaration file content or url

openapi: 3.0.0
paths:
  /test:
    get:
      operationId: Test
      summary: Test
      parameters:
        - name: from
          required: true
          in: query
          description: |-
            From when to retrieve.
            Format ISO 8601 (example: 2021-07-21T13:16:54.050Z)
          schema:
            format: date-time
            type: string
      responses:
        '200':
          description: ''
          content:
            application/json:
              schema:
                allOf:
                  - properties:
                      nextPageCursor:
                        type: string
                        nullable: true
                      data:
                        type: array
                        items:
                          type: object
      tags:
        - test
      security:
        - bearer: []
info:
  title: Generates error
  description: Generates error
  version: 1.0.0
  contact: {}
tags: []
servers: []
components:
  securitySchemes:
    bearer:
      scheme: bearer
      bearerFormat: JWT
      type: http

Generation Details

docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate -i /local/openapi.yaml -g typescript -o /local/gen --skip-validate-spec

Steps to reproduce

• Create a file openapi.yaml and compy the content that is found is this issue.
• execute docker run --rm -v ${PWD}:/local openapitools/openapi-generator-cli generate -i /local/openapi.yaml -g typescript -o /local/gen --skip-validate-spec
• cd gen && yarn
• Should generate the following generation error:

  Type 'Date' has no call signatures.

31         let middlewarePreObservable = from<RequestContext>(requestContextPromise);

This is due to the fact that "from" is a function imported by Typescript AND the name of the parameter, as you can see it in the generated code:

    public test(/*here*/ from: Date, _options?: Configuration): Observable<any> {
        const requestContextPromise = this.requestFactory.test(from, _options);

        // build promise chain
        let middlewarePreObservable = /*here*/ from<RequestContext>(requestContextPromise);

Suggest a fix

If the parameter name can conflict with an internal imported type, rename the parameter to avoid conflicts (in this case, a check that the parameter is not 'from' should do the trick)