Remove the intent of decode a string.

This patch was applied on Debian package:
https://salsa.debian.org/python-team/packages/python-flask-jwt-simple/-/blob/debian/master/debian/patches/0001-Remove-intent-to-decode-a-str-value.patch

Author: eamanu

flask_jwt_simple/jwt_manager.py

@@ -172,5 +172,5 @@ def _create_jwt(self, identity):
         jwt_data = self._get_jwt_data(identity)
         secret = config.encode_key
         algorithm = config.algorithm
-        return jwt.encode(jwt_data, secret, algorithm).decode('utf-8')
+        return jwt.encode(jwt_data, secret, algorithm)