Django-dumpdata-one

- check and test for Django 4.0, 4.1 and Python 3.10

- add --database argument (aadomenech)

- check and test for Django 3.2

Fixed
- roll back to .values method to retrieve field values
- a simple hack to get file url

Added
- dump full file/image url `--full_url={field_name},{other_file_name}`
- limit number of records `--limit={number}`

Changed
- rewrite way to retrieve a field value

Added
- dump all model fields with argument `--fields=*`

Fixed
- multiple fields in order argument