Custom options get overridden by default options when adding a job

Created by: keith666666

Issue

Custom options get overrided by default options when adding a job(add and addBulk).

Affected versions

• v3.18.0
• v3.17.0
• v3.16.0

Related code

https://github.com/OptimalBits/bull/blob/db070a5908ed9b0ba8bd669205a56dc8551d3480/lib/queue.js#L690

Related commit

https://github.com/OptimalBits/bull/commit/ac2fc51c2b8f544a150b83e5969654f5af8de5f7