predis/predis 2.x dependency

[AlexOstrovsky]

Please add predis 2.x support

Problem 1
- Root composer.json requires snc/redis-bundle 4.5.0 -> satisfiable by snc/redis-bundle[4.5.0].
- codeception/module-redis 3.0.0 requires predis/predis ^1.1 -> satisfiable by predis/predis[v1.1.0, ..., v1.1.x-dev].
- snc/redis-bundle 4.5.0 conflicts with predis/predis v1.1.10.
- snc/redis-bundle 4.5.0 conflicts with predis/predis v1.1.2.
- Root composer.json requires codeception/module-redis 3.0.0 -> satisfiable by codeception/module-redis[3.0.0].

[Naktibalda]

Released as 3.1.0, please let me know if you have any issues with it.