Update requirements.txt

[vincent-pli]

Hi the issue with openshift 4.8

2022-03-09T21:21:09.838813134Z Error: Bad module 'app' 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z Usage: 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z waitress-serve [OPTS] MODULE:OBJECT 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z Standard options: 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z --help 2022-03-09T21:21:09.838813134Z Show this information. 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z --call 2022-03-09T21:21:09.838813134Z Call the given object to get the WSGI application. 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z --host=ADDR [snip] 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z There was an exception (ImportError) importing your module. 2022-03-09T21:21:09.838813134Z 2022-03-09T21:21:09.838813134Z It had these arguments: 2022-03-09T21:21:09.839000767Z 1. cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.10/site-packages/itsdangerous/__init__.py)