Fix ruby 2.7 warnings

[PoroshkinaVV]

On running shotgun there was a warning
.rvm/gems/ruby-2.7.0/gems/shotgun-0.9.2/bin/shotgun:156: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call

[ZimbiX]

Thanks for looking at this; I was about to work on a PR myself.

I've confirmed it's at least working with:

• webrick 1.6.0
• puma 5.0.2
• thin 1.7.2
• falcon 0.36.6

[jelaniwoods]

Shotgun fails in ruby 3.0.0 without this change. Is there an estimate on when this change will be released?

[casi]

I appreciate your commitment and look forward to its publication, hopefully soon.

[aidistan]

Could we merge this PR ASAP? We need it desperately to run Shotgun with Ruby 3.

[kandalf]

It looks like this is not getting enough attention yet. I know it's not the best solution, but I've just released a "temporary" fork since I needed to use it with Ruby 3 and needed a gem to properly automate deployment and some scripting.

I'm leaving the link here for anybody that could find it useful until this PR is merged and we can all go back to the official gem.

Hope it helps.

[casi]

@kandalf thanks for your commitment, mate!

[ZimbiX]

Resolves #76

[astromoose]

Who do we need to poke with a stick to get this merged then? 💟