JWT token authentication doesn't work with the firebase/php-jwt ^6.0

[BOB41K1987]

Starting version 6.0 the package firebase/php-jwt changed the signature of \Firebase\JWT\JWT::decode method introducing a BC.

This is the old way that is used in this package
JWT::decode($token, $publicKey, $this->allowedAlgos);

This is the new way used in the firebase/php-jwt
JWT::decode($jwt, new Key($key, 'HS256'));

Here is a full list of changes including this one.