Handle "revert" commits in blogposts

[Ilya Volodin]

Currently, we remove "Revert" commits from the blog posts, this unit tests seems to indicated that's a correct behavior:

eslint-release/tests/lib/release-ops.js

Line 147 in 6e4bd2d

 "* 1234abc Revert \"New: From a previous release (fixes #1234)\" (Foo Bar)", 

If revert happens a different release then original commit, we should probably show it in blog post.

[Brandon Mills]

we should probably show it in blog post

While excluding it from version calculation, yes?

[Ilya Volodin]

I think so. I don't think we should ever include "revert" into version calculation.