Add JWT_VERIFY_EXPIRATION option for jwt.decode

[paulsoh]

resolves #107

[vimalloc]

Just adding this to option to the app.config isn't enough. You need to update the calls to the underlying pyjwt to disable it. Per their docs here: https://pyjwt.readthedocs.io/en/latest/usage.html

...Which is exactly what you did, and I must be blind. That's what I get for thinking I can be smart before the first cup of coffee in the morning. Ignore this comment! :P