Log Message:
www/ruby-sinatra: update to 2.0.5

## 2.0.5 / 2018-12-22

* Avoid FrozenError when params contains frozen value \ 
[#1506](https://github.com/sinatra/sinatra/pull/1506) by Kunpei Sakai

* Add support for Erubi [#1494](https://github.com/sinatra/sinatra/pull/1494) by \ 
@tkmru

* `IndifferentHash` monkeypatch warning improvements \ 
[#1477](https://github.com/sinatra/sinatra/pull/1477) by Mike Pastore

* Improve development support and documentation and source code by Anusree \ 
Prakash, Jordan Owens, @ceclinux and @krororo.