fix: nothing should be returned when using on conflict do nothing (#353)

[nirweiner2]

when we use insert .... on conflict do nothing, and there is a conflict, nothing should be returned because no row was inserted. Fix the code accordingly.
See issue #353

[nirweiner2]

Hey @oguimbal, I would love to get it reviewed if possible.

[oguimbal]

Hi !

Thanks for the PR, and sorry for the delay.

It seems that you're right on your unit test modification, but I believe there is a mistake in the implementation ?

(almost all tests fail with our version... they pass with the below modification)

[nirweiner2]

Hey @oguimbal.
Thank you very much for reviewing this.
I have indeed made a mistake there, it got actually lost during the commit phase in git.
I forced pushed the fix and hopefully it should be okay now.

[oguimbal]

Released as [email protected]

Thanks for spotting that !