Flask-authgen-jwt

Description
* Authors updated in code
* Supported and unsupported versions of the library updated

Description

* Security policy updated
* Pylint action updated correctly to gihub standards
* Added github action to validate the new release is not repeated
* Enhancements in doc strings inside the library
* Updated some third party actions used inside the same github actions created by me
* Instead of using integers inside the library now are the same but using the http library
* The creation of new releases are automated now, so publish to pypi is automated too from the beginning

Improvements added when theres an update to the username and password keys decoded from jwt

Updated requirements file with updated versions of extra dependencies

Description
Added error handler when authorization header is missing, so now the response for that is in JSON format.

Description
The reason about why from 3.0.1 now we are in 4.0.0 is because new functionality added to the library.
* Now to generate tokens there is the possibility to instead of adding username and password that comes from basic auth now it can be possible to use a json body in the request to use the username and password from json body instead of the ones in basic auth credentials.
* Error handlers added to the library that were not considered before.