This package has release/1.0 (the last commit was 2018) and release/1.1 (the last commit was 2020), but we haven't used these release branches and cut 1.0.x releases from main.

In order to maintain gogo version and gogo-free version, I'd like to cut release/1.2 branch from fe7323f and backport bug fixes from main. After that, main will become essentially 2.0 branch.

I'm going to revive release/1.1 (see #254) and backport post-gogo bug fixes from main. After that, main will become essentially 3.0 branch.

We could have release/2.0 release/3.0 like containerd, but it seems too heavyweight for cgroups.