Consider moving to taskforcesh/bullmq

[jooola]

I'm submitting a...

[ ] Regression 
[ ] Bug report
[x] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

nestjs bull rely on https://github.com/OptimalBits/bull

Expected behavior

If I understand it correctly, next major version will be https://github.com/taskforcesh/bullmq

What is the motivation / use case for changing the behavior?

bull next major version is bullmq, rewritten in typescript, I feel we should follow to same path and adopt bullmq.

A notice regarding this newt major version is present here https://github.com/OptimalBits/bull#bullmq-4-beta

[kamilmysliwiec]

We're tracking this as part of this issue #202