Log Message:
www/ruby-sinatra: update to 2.0.8.1

Update ruby-sinatra to 2.0.8.1.

## 2.0.8.1 / 2020-01-02

* Allow multiple hashes to be passed in `merge` and `merge!` for \ 
`Sinatra::IndifferentHash` [#1572](https://github.com/sinatra/sinatra/pull/1572) \ 
by Shota Iguchi

## 2.0.8 / 2020-01-01

* Lookup Tilt class for template engine without loading files \ 
[#1558](https://github.com/sinatra/sinatra/pull/1558). Fixes \ 
[#1172](https://github.com/sinatra/sinatra/issues/1172) by Jordan Owens

* Add request info in NotFound exception \ 
[#1566](https://github.com/sinatra/sinatra/pull/1566) by Stefan Sundin

* Add `.yaml` support in `Sinatra::Contrib::ConfigFile` \ 
[#1564](https://github.com/sinatra/sinatra/issues/1564). Fixes \ 
[#1563](https://github.com/sinatra/sinatra/issues/1563) by Emerson Manabu Araki

* Remove only routing parameters from @params hash \ 
[#1569](https://github.com/sinatra/sinatra/pull/1569). Fixes \ 
[#1567](https://github.com/sinatra/sinatra/issues/1567) by Jordan Owens, Horacio

* Support `capture` and `content_for` with Hamlit \ 
[#1580](https://github.com/sinatra/sinatra/pull/1580) by Takashi Kokubun

* Eliminate warnings of keyword parameter for Ruby 2.7.0 \ 
[#1581](https://github.com/sinatra/sinatra/pull/1581) by Osamtimizer

## 2.0.7 / 2019-08-22

* Fix a regression [#1560](https://github.com/sinatra/sinatra/pull/1560) by \ 
Kunpei Sakai

## 2.0.6 / 2019-08-21

* Fix an issue setting environment from command line option \ 
[#1547](https://github.com/sinatra/sinatra/pull/1547), \ 
[#1554](https://github.com/sinatra/sinatra/pull/1554) by Jordan Owens, Kunpei \ 
Sakai

* Support pandoc as a new markdown renderer \ 
[#1533](https://github.com/sinatra/sinatra/pull/1533) by Vasiliy

* Remove outdated code for tilt 1.x \ 
[#1532](https://github.com/sinatra/sinatra/pull/1532) by Vasiliy

* Remove an extra logic for `force_encoding` \ 
[#1527](https://github.com/sinatra/sinatra/pull/1527) by Jordan Owens

* Avoid multiple errors even if `params` contains special values \ 
[#1526](https://github.com/sinatra/sinatra/pull/1527) by Kunpei Sakai

* Support `bundler/inline` with `require 'sinatra'` integration \ 
[#1520](https://github.com/sinatra/sinatra/pull/1520) by Kunpei Sakai

* Avoid `TypeError` when params contain a key without a value on Ruby < 2.4 \ 
[#1516](https://github.com/sinatra/sinatra/pull/1516) by Samuel Giddins

* Improve development support and documentation and source code by  Olle \ 
Jonsson, Basavanagowda Kanur, Yuki MINAMIYA