Prepare release v3.3.0

Prepare release v3.2.0

Prepare release v3.1.0

Prepare release v3.0.2

chore: migrate to go module (v3.0.0)

- chore: update dependencies: use version with go modules.
- chore: remove dep.
- chore: update backoff imports.
- chore: init go module.
- chore: update CI.
- chore: mod v3
- chore: update docker image.

Prepare release v2.7.2

Prepare release v2.7.1

Prepare release v2.7.0

Prepare release v2.6.0

Prepare release v2.5.0