[BUG][typescript-angular] [5.4.0] Array with inline object not generated correctly

[Nightapes]

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

When generating the json the array type is not generated correctly.

 public getList(observe?: 'body', reportProgress?: boolean, options?: {httpHeaderAccept?: 'application/json', context?: HttpContext}): Observable<Array<object>>;

Object is wrong should be the Item defined in the array

openapi-generator version

My version is 5.4.0:

OpenAPI declaration file content or url

Example file
--> https://gist.github.com/Nightapes/12c38ee1ad6988232e707c49ad5575b4

Generation Details

{
  "$schema": "./node_modules/@openapitools/openapi-generator-cli/config.schema.json",
  "spaces": 2,
  "generator-cli": {
    "version": "5.4.0",
    "generators": {
      "treno": {
        "generatorName": "typescript-angular",
        "glob": "../api.treno.finance/apps/treno-api/openapi.json",
        "output": "libs/main-app/api/src/lib/generated",
        "additionalProperties": {
          "supportsES6": true,
          "stringEnums": true,
          "ngVersion": "13.0.1",
          "providedInRoot": true,
          "disallowAdditionalPropertiesIfNotPresent": false,
          "enumPropertyNaming": "UPPERCASE",
          "enumNameSuffix": "",
          "fileNaming": "kebab-case"
        }
      }
    }
  }
}

Steps to reproduce

Use example and generate lib

Related issues/PRs

Suggest a fix