Update rest-client version to support >2.0.0

[Zarthus]

Versions of Ubuntu 18.04 will run into the following issue because OpenSSL is too new:
rest-client/rest-client#573

/ruby/2.5.0/gems/rest-client-1.8.0/lib/restclient/request.rb:163:in `fetch': key not found: :ciphers (KeyError)

[stakach]

I've noticed this too on 18.04, when performing a HTTP request... Did you find a workaround @Zarthus I'm just playing around with a lib that uses rest-client so haven't dived too deep into the issue

[Zarthus]

@stakach My "workaround" was to stop depending on a library I didn't need.

I changed to rest-client because my use was relatively basic. Zarthus/lobby-utility-bot@c95ed19

[white-gecko]

I had the same issue on debian, but updating rest-client to >= 2.0.1 resolved the issue because of: rest-client/rest-client#573