Add support of Bearer Basic Authorization to Ruby client

[bopm]

PR checklist

• Read the contribution guidelines.
• Ran the shell script under ./bin/ to update Petstore sample so that CIs can verify the change. (For instance, only need to run ./bin/{LANG}-petstore.sh, ./bin/openapi3/{LANG}-petstore.sh if updating the {LANG} (e.g. php, ruby, python, etc) code generator or {LANG} client's mustache templates). Windows batch files can be found in .\bin\windows\. If contributing template-only or documentation-only changes which will change sample output, be sure to build the project first.
• Filed the PR against the correct branch: master, 3.4.x, 4.0.x. Default: master.
• Copied the technical committee to review the pull request if your PR is targeting a particular programming language.

Description of the PR

Add support of Bearer Basic Authorization to Ruby client.

[bopm]

cc @cliffano @zlx @autopp

[bopm]

All formatting issues are covered, but I am struggle to find a way to remove empty lines in generated files.

[bopm]

TravisCI is done, just not updating success here for some reason.

[wing328]

Right. The job is green: https://travis-ci.org/OpenAPITools/openapi-generator/builds/532295927?utm_source=github_status&utm_medium=notification

[wing328]

@bopm thanks for the PR 👍

[bopm]

@wing328 looking forward to bring more if ever face same kind of problems. Thanks for all your work on this project!

[wing328]

@bopm thanks again for your contribution, which has been included in the v4.0.1 release (https://twitter.com/oas_generator/status/1135534738658062336)

[tonywok]

@bopm Hey there, new to open api.

I'd like to take advantage of this feature, but I can't seem to get the generator to produce a client that has the desired auth settings (bearer token).

I'm using a version > v4.0.1. My open api spec is open api version 2.0 -- is this only available in 3.0?

Not sure how to follow the documentation specified here: https://github.com/OpenAPITools/openapi-generator/blob/ccdd56da45cdd7439d6240d3c8018b2c7797d8ed/samples/openapi3/client/petstore/ruby/README.md#bearer_test

[wing328]

JWT Bearer is only available in OAS v3.0 but not v2.0.

Ref: https://github.com/OAI/OpenAPI-Specification/blob/master/versions/3.0.2.md#jwt-bearer-sample