Added support for legacy incoming webhooks.
This makes the following params available.
| key | value | default | description |
|---|---|---|---|
| username | Only legacy incoming webhook supported. | '' | override the legacy integration's default name. |
| icon_emoji | Only legacy incoming webhook supported. | '' | an emoji code string to use in place of the default icon. |
| icon_url | Only legacy incoming webhook supported. | '' | an icon image URL string to use in place of the default icon. |
| channel | Only legacy incoming webhook supported. | '' | override the legacy integration's default channel. This should be an ID, such as C8UJ12P4P. |
Only when using legacy incoming webhooks url, you can specify the channel and change the user icon.