The old formula, while correctly converting the cgroup v1 range to
cgroup v2 range, had a few issues:

1. When cgroup v1 value is out of range, it returned invalid cgroup v2
   value, leading to vague errors down the line (see [1]).
2. Default value cgroup v1 shares of 1024 is converted to 39, which is
   much less than the cgroup v2 default weight of 100 (see [2], [3]).

The new conversion formula fixes both issues (see discussion in [2] for
more details).

Amend the test case accordingly.

[1]: opencontainers/runc#4755
[2]: kubernetes/kubernetes#131216
[3]: opencontainers/runc#4772

Signed-off-by: Kir Kolyshkin <[email protected]>

Rename some variables, and simplify the error message using
the got/want pattern.

Signed-off-by: Kir Kolyshkin <[email protected]>

ConvertCPUSharesToCgroupV2Value: improve

Make sure our github actions stay up to date.

Since this is a package (set of packages), we do not to bump
dependencies to the latest versions automatically, but only
when it is really required, thus sticking to Go's minimum version
selection rules (essentially so that users of these packages
are not required to unnecessarily update their dependencies).

Signed-off-by: Kir Kolyshkin <[email protected]>

This is to ensure our minimal dependencies do not have known
vulnerabilities.

NOTE we do not specify Go version to be used here to avoid reporting
vulnerabilities in stdlib which we're not interested in here.

Signed-off-by: Kir Kolyshkin <[email protected]>

This is to ensure our CI is not rotting away when there are no new PRs
or merges.

Signed-off-by: Kir Kolyshkin <[email protected]>

Add .github/dependabot.yml

This results in different JSON than the older version:

Before commit fd4995c:

    "cgroups": {
      ...
      "devices": [
        ...

After:

    "cgroups": {
      ...
      "Resources": {
        "devices": [

This breaks backward compatibility for runc.

Fixes: fd4995c ("Add omitempty JSON attribute for some fields")
Signed-off-by: Kir Kolyshkin <[email protected]>

Remove annotations from Resources