Newest version Gem 'redis' vs Redis 6 (newest) on heroku

I wondering: is newest version Gem redis is compatible with Redis 6 on heroku ?

I wonder if this gem works for the latest version of redis on heroku(6): Or perhaps it better to use the redis-client gem?

gem redis 5.0.6 (as I see is newest)https://github.com/redis/redis-rb