Feature Request: Support for using emoji or custom icons

[rtud]

Hi there, it would be great if we had the possibility to change the default icon for the Wordpress BOT.

Apart from the default integrations w/ custom post types and so on, we've also made use of it for notifying us in case of errors w/ API calls and caching issues etc. We'd love to be able to access the icon-url or icon-emoji params on sending messages using $slack_plugin method.

Thanks a bunch!

[Padgett]

👍