bump sidekiq
downgrade multi_json
Revert "downgrade multi_json"

This reverts commit 4c4a98f42e455c53018251584ec8dbf6b15792b1.
Do not pass AR objects to Sidekiq

In the new version Sidekiq calls JSON.generate on the passed arguments, which blows up with AR objects
Revert "bump sidekiq"

This reverts commit 9307a1aaeb2825bd025b46c25fc4c3d61b6d7954.
Revert "Do not pass AR objects to Sidekiq"

This reverts commit 32935be9b1f85e0e879883897fb3c7b7dffea7ca.
fix mentions at the end of a post