[BUG] [TypeScript Axios] Generator claims to support Date/DateTime but doesn't

Created by: tibbe

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

I used the TypeScript Axios generator, which claims to support Date/DateTime. Looking at the generated code it's clearly it does not. It does no transformation of the data returned from the server over what Axios does so date time string don't get converted to Date objects.

openapi-generator version

6.0.1. Doesn't seem to be a regression.

OpenAPI declaration file content or url

Propertriatary but here's a sample of a date time field:

      "Channel": {
        "description": "A channel with project data.",
        "properties": {
          "created_at": {
            "format": "date-time",
            "title": "Created At",
            "type": "string"
          },
          "id": {
            "title": "Id",
            "type": "string"
          },
        },
        "required": [
          "created_at",
          "id",
        ],
        "title": "Channel",
        "type": "object"
      },

Generation Details

openapi-generator-cli generate -i ../backend/openapi.json -g typescript-axios -o ./generated/axios -c openapi-typescript-axios.config.json

The config just contains:

{
    "modelPropertyNaming": "original"
}

Steps to reproduce

Use the generator with a date-time field.

Related issues/PRs

Suggest a fix

Add the right transformations to the data returned by Axios.