Content-Type text/plain is not respected

[JochenDiekenbrock]

Given a path that accepts a put operation with a text/plain body:

info:
  title: Demo
  version: '1.0'
swagger: '2.0'
paths:
  '/agency':
    put:
      consumes:
        - text/plain
      produces:
        - text/plain
      parameters:
        - in: body
          name: agency
          required: true
          schema:
            type: string
            example: "123"
      responses:
        '200':
          description: OK
          schema:
            type: string

The generated client code for axios does not set the Content-Type. The Content-Type header in the http request is not set.

agencyUpdate: (agency: string, params: RequestParams = {}) =>
      this.request<string, any>({
        path: `/agency`,
        method: "PUT",
        body: agency,
        ...params
      })

If in the generated code the type is added manually, the Content-Type header is set as specified:

agencyUpdate: (agency: string, params: RequestParams = {}) =>
      this.request<string, any>({
        path: `/agency`,
        method: "PUT",
        type: "text/plain" as any,
        body: agency,
        ...params
      })

Expected behavior: The type should be set according to the "consumes" definition (and the typing of type should be adapted)