Add #select, #reject and #compact methods to Sinatra::IndifferentHash

[ob-stripe]

This PR adds #select, #reject and #compact methods to Sinatra::IndifferentHash.

This allows the following code to work:

foo_strings = params[:foo].select {|_, v| v.is_a?(String)}

if foo_strings[:bar]
  ...

Without this PR, the code above would fail because select returns a regular Hash with string keys.

[jkowens]

Looks good, thanks!

[ob-stripe]

Thank you! Do you know if a release is planned sometimes soon?

[jkowens]

Honestly, I don't know. I don't have the ability to cut a release. Maybe @namusyaka or @zzak could weigh in on that?

[zzak]

Personally I have no plans to release soon, please ping me if there's something urgent we should do. 🙇