Update dependencies#23

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montdidier wants to merge 2 commits intostripe-contrib:masterfrom

montdidier:refresh-dependencies

Commits on Aug 16, 2017

update dependencies
montdidier
committed

Commits on Dec 6, 2017

removed unused method cat_user_agent_string and using Stripe::CLI::VERSION over hardcoded string
montdidier
committed