Can not post an apply comment to the last commit

[shiwano]

Hi,

I'd like to use tfnotify for a GitHub repository whose merging option is squash-and-merge, but tfnotify does not post an apply comment to the last commit (it always posts to one before the last commit).

https://github.com/mercari/tfnotify/blob/master/notifier/github/commits.go#L46

I think this code is a cause. The squash-and-merge commit history does not include the merge commit, so lastOne method does not return the correct one. Is it make sense?

It's implicit behavior, so I would like to configure it in tfnotify.yml if possible.

Thanks.

[Fumipo-Theta]

I have encountered the same problem with squash-and-merge on a GitHub repository, too.