Bump sidekiq from 6.0.4 to 6.2.1#31

dependabot[bot] wants to merge 1 commit intomastergrowcn/ActionCable-example:masterfrom

dependabot/bundler/sidekiq-6.2.1growcn/ActionCable-example:dependabot/bundler/sidekiq-6.2.1Copy head branch name to clipboard