Uploads files to Sypht.

Configuration

Override these defaults in the :sypht_client section of your config.exs files.

• upload_url: "https://api.sypht.com/fileupload" - URL of file upload end point
• upload_field_sets: ["sypht.generic"] - Sypht field set(s) to invoke (see https://docs.sypht.com/#section/Introduction)
• upload_retry_on: [500] - Retry uploads on server HTTP status
• upload_initial_backoff: 200 - Initial backoff milliseconds
• upload_retry_until: 60_000 - Continue backing off and retrying until this many milliseconds have elapsed
• upload_http_options: [ssl: [{:versions, [:"tlsv1.2"]}]] - Hackney HTTP options for uploads
• upload_error_prefix: "SyphtUpload failed:" - Prefix upload error messages with this