2.2.4 release broken

[Gabriel Arjones]

index.rb is missing from the released gem

irb(main):001:0> require 'xdg'
LoadError: cannot load such file -- /var/lib/gems/2.3.0/gems/xdg-2.2.4/lib/xdg/index
	from /var/lib/gems/2.3.0/gems/xdg-2.2.4/lib/xdg.rb:28:in `require_relative'
	from /var/lib/gems/2.3.0/gems/xdg-2.2.4/lib/xdg.rb:28:in `<module:XDG>'
	from /var/lib/gems/2.3.0/gems/xdg-2.2.4/lib/xdg.rb:26:in `<top (required)>'
	from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `require'
	from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:127:in `rescue in require'
	from /usr/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:40:in `require'
	from (irb):1
	from /usr/bin/irb:11:in `<main>'

[Brooke Kuhlmann]

🙇 @g-arjones. I recently took over this project and would encourage you to follow the issue here: bkuhlmann/xdg#1.

[Gabriel Arjones]

Thanks for the patch!