[BUG][typescript-axios] The generated ts file from 5.0.0 cannot be transpiled.

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?
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Description

The generation works fine with the 5.0.0-beta2. When switching to the stable version 5.0.0, the generated code has some compilation errors: TS2339: Property 'isJsonMime' does not exist on type 'Configuration'.

openapi-generator version

5.0.0

OpenAPI declaration file content or url

---
openapi: 3.0.0
info:
  title: Swagger Test Service
  description: Test Service for OpenApi version 2 aka. Swagger as YAML file.
  version: 1.0.0
paths:
  "/entities/{pathParam}":
    parameters:
    - in: path
      name: pathParam
      required: true
      schema:
        type: string
    post:
      summary: Test POST
      operationId: postEntity
      description: Test POST
      parameters:
      - in: query
        name: queryParam
        schema:
          type: string
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: array
                minItems: 0
                items:
                  "$ref": "#/components/schemas/TestEntity"
      tags:
      - default
    patch:
      summary: Test PATCH
      operationId: patchEntity
      requestBody:
        content:
          application/json:
            schema:
              "$ref": "#/components/schemas/TestEntity"
      responses:
        '200':
          description: Success
      tags:
      - default
components:
  schemas:
    TestEntity:
      type: object
      properties:
        stringProperty:
          type: string
          description: A string property
        integerProperty:
          type: integer
          description: An integer property
tags:
- name: default

Generation Details

npx openapi-generator-cli generate --input-spec /input-dir/open-api.json --generator-name typescript-axios --output /output-dir/openapi --template-dir /template-dir/templates --api-package api --model-package model --additional-properties withSeparateModelsAndApi=true --skip-validate-spec

Steps to reproduce

1. Generate the client by using the command and the spec file above.
2. Transpile the generated code and see TS2339: Property 'isJsonMime' does not exist on type 'Configuration'.

Suggest a fix

Make isJsonMime as an optional function of the type Configuration.

[denodaeus]

This works, but honestly, it makes for a really not-nice API:

Before:

const API = new TradeblottersApi({
        // TODO: for some reason swagger client removes port from requests if you don't specify the "basePath"
        basePath: 'http://localhost:3000',
        baseOptions: {
            withCredentials: true,
        },
    });

Now:

const API = new TradeblottersApi(
    new Configuration({
        // TODO: for some reason swagger client removes port from requests if you don't specify the "basePath"
        basePath: 'http://localhost:3000',
        baseOptions: {
            withCredentials: true,
        },
    }),
);

[jjtang1985]

Hi @macjohnny , I resolve the issue by updating the configuration template from the 5.0.0. Thank you for taking care.