Slack node uses deprecated scopes

[trygvis]

Describe the bug
The Slack-Node requests the deprecated conversations:read and conversations:history scopes leading to authorization failures when trying to authorize the app.

Message from Slack:

Invalid permissions requested
User tokens do not support scopes: conversations:history, conversations:read

I'm using OAuth authentication and guessed which scopes that is required, I couldn't find a list of required scopes.

To Reproduce
Try to publish a slack message with OAuth authentication.

Environment (please complete the following information):

• n8n Version: 0.69.1, from the published docker image

[RicardoE105]

@trygvis Thanks very much. Will check it out.

[RicardoE105]

@trygvis Just sent a PR fixing this, will let you know when is released. Again, Thanks.

[janober]

Fix got released with [email protected]