Detect Arrays `tool create`

[JensKrumsieck]

If e.g. a python script uses

parser.add_argument("--col", action='append', help="Column to join on")

the parser should recognize an array if it gets multiple inputs of same id and type

Currently it is parsed to:

- id: col
  type: string
  default: Gebietsnummer
  inputBinding:
    prefix: --col
- id: col
  type: string
  default: Gebietsname
  inputBinding:
    prefix: --col
- id: col
  type: string
  default: Gruppenname
  inputBinding:
    prefix: --col

which is bogus