Add missing REST methods

[lestrrat]

List of currently unimplemented REST methods. They are only unimplemented because the author had no immediate need for them.

Please either:

1. Send a PR that implements the method (yay! :heart: you!)
2. Send a PR with a failing test case (pretend the method exists) 😍
3. File a separate issue so I know which methods are needed more urgently :beer:

---

• [x] bots.info
• [x] channels.archive
• [x] channels.create
• [x] channels.invite
• [x] channels.join
• [x] channels.kick
• [x] channels.leave
• [x] channels.mark
• [x] channels.rename
• [x] channels.replies
• [x] channels.setPurpose
• [x] channels.setTopic
• [x] channels.unarchive
• [x] chat.unfurl
• [ ] dnd.endDnd
• [ ] dnd.endSnooze
• [ ] dnd.info
• [ ] dnd.teamInfo
• [x] emoji.list
• [ ] files.comments.add
• [ ] files.comments.delete
• [ ] files.comments.edit
• [ ] files.delete
• [ ] files.info
• [ ] files.list
• [ ] files.revokePublicURL
• [ ] files.sharedPublicURL
• [ ] files.upload
• [x] groups.archive
• [ ] groups.close
• [x] groups.create
• [x] groups.createChild
• [x] groups.history
• [x] groups.info
• [x] groups.invite
• [x] groups.kick
• [x] groups.leave
• [x] groups.list
• [x] groups.mark
• [x] groups.open
• [x] groups.rename
• [x] groups.replies
• [x] groups.setPurpose
• [x] groups.setTopic
• [x] groups.unarchive
• [ ] im.close
• [ ] im.history
• [ ] im.list
• [ ] im.mark
• [ ] im.open
• [ ] im.replies
• [ ] mpim.close
• [ ] mpim.history
• [ ] mpim.list
• [ ] mpim.mark
• [ ] mpim.open
• [ ] mpim.replies
• [ ] pins.add
• [ ] pins.list
• [ ] pins.remove
• [x] reminders.add
• [x] reminders.complete
• [x] reminders.delete
• [x] reminders.info
• [x] reminders.list
• [ ] search.all
• [ ] search.files
• [ ] search.messages
• [ ] stars.add
• [ ] stars.list
• [ ] stars.remove
• [ ] team.accessLogs
• [ ] team.billableInfo
• [ ] team.info
• [ ] team.integrationLogs
• [ ] team.profile.get
• [x] usergroups.create
• [x] usergroups.disable
• [x] usergroups.enable
• [x] usersgroups.list
• [x] usergroups.update
• [x] usergroups.users.list
• [x] usergroups.users.update
• [x] users.deletePhoto
• [x] users.identity
• [x] users.setActive
• [ ] users.setPhoto
• [x] users.setPresence
• [x] users.profile.get
• [x] users.profile.set

[inoc603]

I implemented the dialog.open method #45 , which is missing in this list. Would you take look?