rest-client dependency

[alxx]

Is there any reason why this gem depends on rest-client ~> 1.4?

I'm already using rest-client 2.0 and I'm pretty happy with it. I wouldn't want to downgrade.

[vdegove]

The gem doesn't work with Ruby 2.4 and Rails 5.2, that install rest-client 1.8. You have an error message KeyError: key not found: :ciphers from rest-client. Upgrading to rest-client 2.0 solves the problem, so it would be welcomed to drop the limitation for rest-client >= 2.0.

I can happily do a pull request that lifts this limitation.

[doblesantos]

#22

[vdegove]

I think this issue can be closed given #22