dropbox-bot: Update to support dropbox>=11.0.0.
Changes in dropox version >= 11.0 broke the dropbox bot.
The required fixes are mentioned at:
MODIFY
zulip_bots/zulip_bots/bots/dropbox_share/dropbox_share.py
zulip_bots/zulip_bots/bots/dropbox_share/dropbox_share.py
-from dropbox.dropbox import Dropbox
+from dropbox import Dropbox
from typing import Any, Dict, List, Tuple
import re

MODIFY
zulip_bots/zulip_bots/bots/dropbox_share/requirements.txt
zulip_bots/zulip_bots/bots/dropbox_share/requirements.txt
-# Tests fail with Dropbox >= 11.
-dropbox==10.*
+dropbox

dropbox-bot: Update to support dropbox>=11.0.0.

Changes in dropox version >= 11.0 broke the dropbox bot.
The required fixes are mentioned at:
https://github.com/dropbox/dropbox-sdk-python/blob/main/UPGRADING.md#upgrading-from-v10xx-to-v1100