Change RUN_DEPENDS from rubygem-sidekiq to rubygem-sidekiq5

• Bump PORTREVISION for dependency change

Use the same rubygem-sidekiq for gitlab-ce and its dependencies.

• gitlab-ce: sidekiq ~> 5.2.7
• rubygem-gitlab-sidekiq-fetcher: sidekiq ~> 5
• rubygem-sidekiq-cron: sidekiq >= 4.2.1

Change RUN_DEPENDS to rubygem-sidekiq5 to avoid conflict of bin/sidekiq between
rubygem-sidekiq and rubygem-sidekiq5.

Reported by: swills