Flask 2.2.0 `json_encoder` and `json_decoder` are deprecated

[Sir-MaNiAl]

Since Flask 2.2.0 json_encoder and json_decoder properties on app are deprecated and was set to None by default (Flask changelog)
JWTManager._encode_jwt_from_config method relies on it. It now raises errors on datetime, UUID, etc. values serialisation.

[vimalloc]

Thank you for the heads up, looks like there are a few things I need to update for this newest flask release. I will try to get everything updated in the next day or two here!

[jrast]

Looking into this and it seems not as easy to switch to the new concept used by flask regarding json:

• with app.json_provider_class flask allows now to switch out the complete stdlib json module for another implementation
• PyJWT does use the stdlib json module and only allows a change of the JSON Encoder

PS: It seems like the case @Sir-MaNiAl mentions where encoding fails is not covered by any tests.

[jrast]

In a first step (Commig 4f18aca) I just reused to old Flask JSONEncoder class and use this as default. However, this will break of someone uses a custom JSON Encoder.

[vimalloc]

Fix released in version 4.4.4. Cheers!