Possible to have reminders accept multiple usernames?

[matthewfeickert]

👋 Hi. Thanks for creating buffy as my experience of using it through JOSS's editorialbot has been fantastic. At the moment there are reminders which

buffy/docs/responders/reminders.md

Lines 7 to 14 in 66fd7dd

	## Listens to
	```
	@botname remind @username in 2 weeks
	```
	```
	@botname remind @reviewer in 10 days
	```

At the start of a review for JOSS I usually like to set reminders for all reviewers so that they get a nonjudgmental remindre from a bot after 2-3 weeks (c.f. openjournals/joss-reviews#5789 (comment)). However, this can be noisy as there buffy currently requires a single username to be provided, and so there are 2n comments made on the review for each reminder.

Would it be at all feasible for buffy to accept both a single username

@botname remind @usernameA in 2 weeks

as well as a comma seperated list of usernames

@botname remind @usernameA, @usernameB, @usernameC in 2 weeks

?