Yeah, when I say “pre-1.0” and “post-1.0” in that Discourse post, I am referring to the version number of the package. That is, “pre-1.0” refers to a package where the package’s version number is of the form 0.y.z. And “post-1.0” refers to a package where the package’s version number is of the form x.y.z where x is greater than or equal to 1.
Quoting from that post:
Nothing in that Discourse post has anything to do with the Julia version that you are using.