Allow minItems 0 to work for tabarray and array components

[renanra]

The change we made was allow minItems: 0 to work properly.

When using tabarray or array components, JsonForm will create a empty child if none is present on data(value).

Given the following schema:

{
  "schema": {
    "friends": {
      "type": "array",
      "items": {
        "type": "object",
        "title": "Friend",
        "properties": {
          "nick": {
            "type": "string",
            "title": "Nickname",
            "required": true
          }
        }
      }
    }
  }
}

You can have no friends, but if you have one, they must have a nickname.
So, if one child is create if none is present, it kind of forces users to fill the friend's nickname.
Setting minItems: 0 solve this problem.

[albertoleal]

+1

[christianbundy]

Merged on my fork, thank you!

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[tchapi]

This has been fixed by #264 I think