Support file_input elements on modals

[obed-sj]

Description
Support file_input element

"blocks": [  
{
  "type": "input",
  "block_id": "input_block_id",
  "label": {
    "type": "plain_text",
    "text": "Upload Files"
  },
  "element": {
    "type": "file_input",
    "action_id": "file_input_action_id_1",
    "filetypes": ["jpg", "png"],
    "max_files": 5,
  },
}
]

(Optional) Slack's documentation
file_input

[parsley42]

@ObedSj I've just noticed you've started maintaining a separate fork of slack-go/slack, which is fine/cool - but, do you have any interest in being added as a maintainer for the main project?

[obed-sj]

@ObedSj I've just noticed you've started maintaining a separate fork of slack-go/slack, which is fine/cool - but, do you have any interest in being added as a maintainer for the main project?

Hey @parsley42 I'm so sorry for the super late reply here! I missed this notification.

So I'm fairly new to programming, but I am trying to learn a lot to become better. I'd love to be added as a maintainer on the main project, I think it would give me a lot of learning opportunities and hopefully I can provide benefits to the repo.

If that's okay with you, feel free to add me

[parsley42]

Hi @ObedSj, good to hear from you. Recently another developer stepped up, but it would be great to have some backup. Do you mind sending me an email at [email protected] so that I have reliable contact info? Thanks!