chore(deps): bump flask from 1.0.2 to 2.0.1

Bumps [flask](https://github.com/pallets/flask) from 1.0.2 to 2.0.1.
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@1.0.2...2.0.1)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

requirements.txt

@@ -1,6 +1,6 @@
 APScheduler==3.7.0
 coverage==5.5
-Flask==1.0.2
+Flask==2.0.1
 Flask-JWT-Extended==3.25.0
 Flask-Mail==0.9.1
 Flask-Migrate==2.5.3