tasks_base.rb#get_tasks() pagination broken

[apiology]

/tasks appears to be a legacy endpoint which requires limit be specified if the number of tasks returned would require pagination:

• https://developers.asana.com/docs/get-multiple-tasks
• https://developers.asana.com/docs/pagination

Unfortunately, 'limit' is not sent in automatically in the Ruby client library, nor is it allowed to be sent in by the client library user. Arguably it should be a keyword argument that defaults to 20 and can be overridden.

• https://github.com/Asana/ruby-asana/blob/master/lib/asana/resources/gen/tasks_base.rb#L198-L202

As a result, in Ruby, client.tasks.get_tasks() cannot be used when it would return a great number of items.

In addition, the documentation is wrong, as it suggests you can pass in 'limit' as part of the options - this has no effect, as it gets translated to 'opt_limit', which is not recognized by the API.

[apiology]

I've tweaked the generated code here: https://github.com/Asana/ruby-asana/compare/master...apiology:per_page_for_get_tasks?expand=1

I've tested with my use case and it works great. Happy to offer that as a PR.

I tried to regenerate the code from the OpenAPI spec in the hopes I could fix this in the templating process somewhere. Unfortunately, the referenced https://github.com/rossgrambo/swagger-codegen from @rossgrambo is not a valid public repo (see https://github.com/Asana/developer-docs/blob/master/Makefile#L60). The unforked version gives me an error: Exception in thread "main" java.lang.RuntimeException: Can't load config class with name asana-ruby.