Release v0.12.44

Release v0.12.43

Release v0.12.42

Release v0.12.41

Release v0.12.40

Prepare v0.12.39 release

Release v0.12.38

Prepare release v0.12.37:

- Upgrade alertmanager from v0.22.0 to v0.22.1
- Upgrade pushgateway from v1.4.0 to v1.4.1
- Update metadata to include latest master commits

Prepare v0.12.36

- Upgrade alertmanager from v0.21.0 to v0.22.0
- Upgrade alertmanager (pre-release) from v0.21.0-rc.1 to v0.22.0-rc.2
- Upgrade mysqld_exporter from v0.12.1 to v0.13.0
- Update metadata to include latest master commits
- Use credentials for hub.docker.com

Release v0.12.35:

- Upgrade Prometheus from v2.27.0 to v2.27.1
- Upgrade kafka_exporter_danielqsj from v1.3.0 to v1.3.1
- Upgrade mongodb_exporter_percona from v0.20.4 to v0.20.5
- Update metadata to include latest master commits