support for redis 4.1.1

[mora123456]

I tried installing the latest redis version (4.1.1) and I got the following error:

$poetry add --dev fakeredis
Using version ^1.7.0 for fakeredis

Updating dependencies
Resolving dependencies... (1.6s)

  SolverProblemError

  Because no versions of fakeredis match >1.7.0,<2.0.0
   and fakeredis (1.7.0) depends on redis (<4.1.0), fakeredis (>=1.7.0,<2.0.0) requires redis (<4.1.0).
  So, because security-service depends on both redis (^4.1.1) and fakeredis (^1.7.0), version solving failed.

can you please add support for the latest redis version(4.1.1)?

thank you :)