Use `URI::Parser#escape` instead of deprecated `URI.escape` in `Sinatra::Decompile`
Merge pull request #127 from vipulnsward/uri-parser

Use `URI::Parser#escape` instead of deprecated `URI.escape` in `Sinatra::Decompile`
Limit backports usage in specs
Merge pull request #134 from bjeanes/limit-backports-in-specs

Limit backports usage in specs
specs for sinatra/sinatra-contrib#28
Only test latest 2.1.x versions of Ruby