Version bumps for gems (#4002)

* Update aws-sdk to version 2.10.4

* Update bootsnap to version 1.1.1

* Update capistrano to version 3.8.2

* Update capybara to version 2.14.4

* Update cld3 to version 3.1.3

* Update http_accept_language to version 2.1.1

* Update sidekiq to version 5.0.3

* Update rspec-sidekiq to version 3.0.3

* Update sidekiq-scheduler to version 2.1.7

* Update oj to version 3.2.0

* Update openssl to version 2.0.4

* Update pg to version 0.21.0

* Update twitter-text to version 1.14.6

* Update unicode-display_width to version 1.3.0

* Update scss_lint to version 0.54.0

* Update hamlit to version 2.8.4

* Update erubi to version 1.6.1

* Update httplog to version 0.99.4

* Update aws-sdk to version 2.10.6