ci(cirrus): use cirrus-ci alongisde travis-ci

* Based on response from Cirrus CI:
  - https://github.com/fkorotkov/nginx-formula/pull/1

## [0.2.2](https://github.com/saltstack-formulas/syslog-ng-formula/compare/v0.2.1...v0.2.2) (2019-05-26)

### Documentation

* **readme:** add testing requirements section ([06de318](https://github.com/saltstack-formulas/syslog-ng-formula/commit/06de318))

docs(readme): add testing requirements section

## [0.2.1](https://github.com/saltstack-formulas/syslog-ng-formula/compare/v0.2.0...v0.2.1) (2019-05-26)

### Bug Fixes

* **inspec:** move test suite to test/integration/default ([0ba5fce](https://github.com/saltstack-formulas/syslog-ng-formula/commit/0ba5fce))
* **inspec:** update Inspec profile definition ([85bdfbb](https://github.com/saltstack-formulas/syslog-ng-formula/commit/85bdfbb))

### Continuous Integration

* **kitchen:** rename Kitchen config file ([dcbc58d](https://github.com/saltstack-formulas/syslog-ng-formula/commit/dcbc58d))
* **kitchen+travis:** test with more distros ([b1acda9](https://github.com/saltstack-formulas/syslog-ng-formula/commit/b1acda9))
* **travis:** debian wheezy is no longer supported ([e6d2a06](https://github.com/saltstack-formulas/syslog-ng-formula/commit/e6d2a06))

### Documentation

* **readme:** fix typos, update README with testing info ([35d0ca4](https://github.com/saltstack-formulas/syslog-ng-formula/commit/35d0ca4))
* **readme:** update readme ([0193e22](https://github.com/saltstack-formulas/syslog-ng-formula/commit/0193e22))
* **semantic-release:** implement an automated changelog ([98e17dd](https://github.com/saltstack-formulas/syslog-ng-formula/commit/98e17dd))

feat(semantic-release): implement an automated changelog

Add Kitchen tests

See https://hub.docker.com/r/dockerbase/syslog-ng/~/dockerfile/

Switch template to jinja

corrected little typo

Add possibility to install additional packages