`opts` (optional) An object with these properties:
- `killBehavior` (optional) - Dictates if your worker will be deleted in case a task is active on it.
- **KillBehaviors.SOFT**: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but a task is still executing or queued, then the worker **won't** be deleted.
- **KillBehaviors.HARD**: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but a task is still executing or queued, then the worker will be deleted.
+ **KillBehaviors.SOFT**: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but the worker is stealing tasks or a task is executing or queued, then the worker **won't** be deleted.
+ **KillBehaviors.HARD**: If `currentTime - lastActiveTime` is greater than `maxInactiveTime` but the worker is stealing tasks or a task is executing or queued, then the worker will be deleted.
This option only apply to the newly created workers.
Default: `KillBehaviors.SOFT`