* Update better_errors to version 2.4.0

* Update binding_of_caller to version 0.7.3

* Update bootsnap to version 1.1.5

* Update browser to version 2.5.2

* Update capistrano to version 3.10.0

* Update capistrano-bundler to version 1.3.0

* Update capistrano-rbenv to version 2.1.2

* Update capybara to version 2.15.4

* Update cld3 to version 3.2.1

* Update fabrication to version 2.18.0

* Update fog-openstack to version 0.1.22

* Update kaminari to version 1.1.1

* Update lograge to version 0.7.1

* Update nokogiri to version 1.8.1

* Update oj to version 3.3.9

* Update ox to version 2.8.1

* Update parallel_tests to version 2.17.0

* Update pkg-config to version 1.2.8

* Update rspec-rails to version 3.7.1

* Update rubocop to version 0.51.0

* Update scss_lint to version 0.55.0

* Update sidekiq to version 5.0.5

* Update sidekiq-scheduler to version 2.1.10

* Update tzinfo-data to version 1.2017.3

* Update webpacker to version 3.0.2

* bundle update

Deployment with Capistrano was failing due to a mismatch between the loaded
version of Capistrano and the one specified in the deployment
configuration. Bumping the version in config/deploy.rb fixes this issue.

Related to #1533.