Niet

-----

* [feature] Introduce the `additional-objects` parameter to allow multi researches

-----

* [feature] the toml format is now supported by niet (https://github.com/openuado/niet/pull/77)
* [fix] replace deprecated `pkg_resources` by `importlib.metadata`
* [CI/CD] move away from travis CI and fix existing github actions
* [CI/CD] publish to pypi with github actions
* [CI/CD] introduce black and isort and a couple of new dev tools

-----

* [packaging] rewrite the way we package niet and move away from pbr
* [doc] update the contribution guide

-----

* [fix] return key equal to False and 0 rather than raising an element not found (https://github.com/openuado/niet/issues/72)
* [requirements] bump PyYAML from version 5.1 to version 5.4.1
* [doc] improve documentation and error messages

-----

* fix changelog and integration badges

-----

* Adding a debug mode to niet
* [doc] add more examples for the `comma` format