allow predis 2.0

switch to Github actions

Laravel 8

add new PHP versions to Travis

Laravel 6.0

register ‘mock’ redis driver

Since Laravel 5.8.30 it is possible to register a custom Redis driver. No need to overwrite RedisManager any more.

laravel/framework#29275

Merge pull request josiasmontag#5 from tomlankhorst/feature/support-p…

…ipeline

Support pipeline

Update redis-mock to 4.2

Laravel 5.8

Laravel 5.7 compatible