send pre_save and post_save signals before and after bulk_update

[renskiy]

I think this should be nice feature

[itimky]

It's a great feature, but It could break backwards compatibility. I think it should be optional.

[ulgens]

Django's bulk_create emit those signals and i don't think it should be implemented here.

https://docs.djangoproject.com/en/2.1/ref/models/querysets/#bulk-create

[renskiy]

As @itimky said, this can be done optionally. Moreover there is default implementation of bulk_update out of the box already: in django 2.2