Promote ip-masq-agent:v2.12.0.

[MrHohn]

Cutting a new release for https://github.com/kubernetes-sigs/ip-masq-agent/releases/tag/v2.12.0.

Primary changes:

1. Add support for --to-ports flag (Implement --to-ports flag to specify explicit masquerading to-ports kubernetes-sigs/ip-masq-agent#162).
2. Add support for --random-fully flag (Add --random-fully=true|false flag to ip-masq-agent kubernetes-sigs/ip-masq-agent#126).
3. Pickup latest CVE fixes.
4. Update dependencies version (golang, k8s, etc.).

/cc @jingyuanliang

[k8s-ci-robot]

@MrHohn: GitHub didn't allow me to request PR reviews from the following users: jingyuanliang.

Note that only kubernetes members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to this:

Cutting a new release for https://github.com/kubernetes-sigs/ip-masq-agent/releases/tag/v2.12.0.

Primary changes:

1. Add support for --to-ports flag (Implement --to-ports flag to specify explicit masquerading to-ports kubernetes-sigs/ip-masq-agent#162).
2. Add support for --random-fully flag (Add --random-fully=true|false flag to ip-masq-agent kubernetes-sigs/ip-masq-agent#126).
3. Pickup latest CVE fixes.
4. Update dependencies version (golang, k8s, etc.).

/cc @jingyuanliang

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: MrHohn

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