Query middleware support

[ramiel]

Update counters on findOneAndUpdate and update
Based on the work by @linusbrolin.

• Add tests
• Rebase on latest develop
• Add tests for multi option (on update)
• Add same functionality for referenced fileds
• Try to avoid a query to know if the upsert inserted a document

[linusbrolin]

I found another bug, when using scoped counter (I never tested that before, my bad), where the reference value(s) would be null.
I've fixed it in my fork (same branch as before), so you should probably update this PR to the latest code from my branch.

[ramiel]

I'll do, and I will add the related test

[coveralls]

Coverage remained the same at 100.0% when pulling 12939b8 on query-middleware-support into 727be42 on develop.

[coveralls]

Coverage remained the same at 100.0% when pulling b50319d on query-middleware-support into 16e3d01 on develop.

[coveralls]

Coverage remained the same at 100.0% when pulling 96d6639 on query-middleware-support into 65ec0a1 on develop.

[coveralls]

Coverage remained the same at 100.0% when pulling 98b11b8 on query-middleware-support into 65ec0a1 on develop.

[blocks-master]

any update ? It's still not working for findOneAndUpdate

[linusbrolin]

@ramiel I have now rebased my branch on the latest code from your master branch, and updated the code accordingly.
https://github.com/linusbrolin/mongoose-sequence/tree/query-middleware-support
It should work with the parallel_hooks option, but I have not added any tests for it due to limited amount of time.
I am however using it in a work project and it is working there.

If you could add the needed tests then I would very much appreciate it, otherwise I'll see if I can find time to do that myself.

For now I have added a check for the multi option on update, and exit the hook if true.
And I have not added support for updateMany either, yet, due to limited time.

But I honestly think we should at the very least get support for upserting single documents released now, as it's been 5 years since my original PR!
Or if someone wants to help adding support for updateMany and update with multi: true?

Let me know what you think.