Relax rake dependency
Created by: yujinakayama
... so that we can notice when any breaking change is introduced in a major version bump of rake.
Ref: #2197
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: yujinakayama
... so that we can notice when any breaking change is introduced in a major version bump of rake.
Ref: #2197