Bump flask from 1.1.2 to 2.0.0

Bumps [flask](https://github.com/pallets/flask) from 1.1.2 to 2.0.0.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@1.1.2...2.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

requirements.txt

@@ -1,7 +1,7 @@
 setuptools==56.1.0
 pymongo==3.11.4
 netaddr==0.8.0
-flask==1.1.2
+flask==2.0.0
 terminable_thread==0.7.1
 watchdog==2.1.0
 pyshark==0.4.3