Prom2teams

[Full Changelog](https://github.com/idealista/prom2teams/compare/2.5.7...2.5.8)
Fixed
* *[201](https://github.com/idealista/prom2teams/issues/201) /metrics server not working* vicsufer

[Full Changelog](https://github.com/idealista/prom2teams/compare/2.5.6...2.5.7)
Fixed
- *[189](https://github.com/idealista/prom2teams/issues/189) Fixed handling alerts with truncated fields* dgalcantara
- *[190](https://github.com/idealista/prom2teams/pull/190) Fixed handling of additional json properties of alertmanager 0.21.0* lazyBisa
- *[202](https://github.com/idealista/prom2teams/issues/202) Fix error publishing 2.5.7 release* pablogcaldito
- *[189](https://github.com/idealista/prom2teams/issues/189) Fixed handling alerts with truncated fields* dgalcantara

[Full Changelog](https://github.com/idealista/prom2teams/compare/2.5.5...2.5.6)
Fixed
- *[190](https://github.com/idealista/prom2teams/pull/190) Fixed handling of additional json properties of alertmanager 0.21.0* lazyBisa

[Full Changelog](https://github.com/idealista/prom2teams/compare/2.5.4...2.5.5)
Changed
- *[175](https://github.com/idealista/prom2teams/issues/175) Building docker image using multi-stage build feature* dortegau

Fixed
- *[158](https://github.com/idealista/prom2teams/issues/158) Fixing Travis Badge (pointing to master branch) and reordering TOC* dortegau
- *[177](https://github.com/idealista/prom2teams/issues/177) Fixing unit tests when using Python <= 3.6* dortegau
- *[182](https://github.com/idealista/prom2teams/issues/182) Fix dependances versions; yaml-dev in docker container; updated pyyaml package* ftsao

[Full Changelog](https://github.com/idealista/prom2teams/compare/2.5.3...2.5.4)
Fixed
- *[162](https://github.com/idealista/prom2teams/issues/162) Fix werkzeug version to 0.16.1 (1.0.0 breaks current prom2teams version)* frantsao

[Full Changelog](https://github.com/idealista/prom2teams/compare/2.5.2...2.5.3)
Fixed
- *[138](https://github.com/idealista/prom2teams/issues/138) Add ExtraAnnotations field extraction* Aaron-ML