Ignore invite links to DFeedback

[MoonlightCapital]

closes #131

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• [x] I agree to the Contribution Guidelines and to the Code of Conduct
• [x] I tested my code and I verified it's working to the best of my ability
• [x] I checked if my code doesn't violate the styleguide with npm test

Describe your pull request

This allows invites to the Discord Feedback site to be sent through the bot.

Why is this change needed?

I felt like doing some contributions to the bot to clean up the backlog of issues.

Does your pull request solve an open issue? If yes, please mention what one closes #131

See https://help.github.com/en/articles/closing-issues-using-keywords

[Arzte]

This should probably include discord testers, as it should also be a valid invite someone could place in a comment

[Kitty-Therapist]

@MoonlightCapital Can you include Discord Testers as well if it's not already included?

[MoonlightCapital]

Later when I get home.

[Dougley]

Stale