Auto-changelog

* update requirements
* set up pre-commit in Gitlab CI
* set up tests in a GitHub actions
* set up pre-commit in a GitHub actions
* update tooling
* drop support for python 3.6
* (poetry): update locked dependencies
* (poetry): update pyproject.toml to use poetry.groups
* black

Full set of changes: [`0.5.3...0.6.0`](https://gitlab.com/KeNaCo/auto-changelog/compare/0.5.3...0.6.0)

* (flake8): remove unused import
* Add sandbox folder to gitignore
* (python): drop python 3.5, add support for python 3.9
* (black): fix unsupported py39 target
* fix flakes complains
* Remove unused import
* Line-break long strings
* Use raw string for regex pattern
* Run black on previous PR
* add invalid template finle name test
* Small improvements in multiple tests
* Add more tests for default remote
* Add notes from JS implementation cross testing
* add integration and unit testing
* refactor integration test
* remove xfail markers from integration tests
* Add integration tests for issue [79](https://gitlab.com/KeNaCo/auto-changelog/issues/79)

Full set of changes: [`0.5.1...0.5.3`](https://gitlab.com/KeNaCo/auto-changelog/compare/0.5.1...0.5.3)

Full set of changes: [`0.5.0...0.5.1`](https://gitlab.com/KeNaCo/auto-changelog/compare/0.5.0...0.5.1)

* (poetry): Update dependencies in lock file
* Fix Readme contributing description
* Add support for python3.8 [51](https://gitlab.com/KeNaCo/auto-changelog/issues/51)
* Add integration tests for --tag-prefix --tag-pattern
* add more tests to test --compare-url option
* refactor assert condition to make it simpler
* add tests of --tag-prefix, --tag-pattern and --compare-url options
* Add --issue-pattern with invalid pattern integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --starting-commit with only one commit integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add skipping unreleased integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --stopping-commit integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --starting-commit integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --stdout integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --issue-pattern integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --issue-url integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --unreleased integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --latest-version integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --upstream integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --output integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --description integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --title integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --repo integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add --help integration test [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)
* Add integration tests [50](https://gitlab.com/KeNaCo/auto-changelog/issues/50)

Full set of changes: [`0.4.0...0.5.0`](https://gitlab.com/KeNaCo/auto-changelog/compare/0.4.0...0.5.0)

* (black): Black reformatting [43](https://gitlab.com/KeNaCo/auto-changelog/issues/43)
* add tests to test new generation of issue url

Full set of changes: [`0.3.0...0.4.0`](https://gitlab.com/KeNaCo/auto-changelog/compare/0.3.0...0.4.0)

* (ci): Add build and release jobs [21](https://gitlab.com/KeNaCo/auto-changelog/issues/21)
* Update pyproject.toml [21](https://gitlab.com/KeNaCo/auto-changelog/issues/21)
* Add black for formatting
* Remove docs and examples
* (poetry): Upgrade dependencies [27](https://gitlab.com/KeNaCo/auto-changelog/issues/27)
* Use Poetry as dependency and build managing tool [18](https://gitlab.com/KeNaCo/auto-changelog/issues/18)
* Set version to 1.0.0dev1 [17](https://gitlab.com/KeNaCo/auto-changelog/issues/17)
* (git): Replace manual gitignore with new generated one [17](https://gitlab.com/KeNaCo/auto-changelog/issues/17)
* (CI): Add gitlab CI support
* Reformatted by black
* Typo in docstrings
* Typo in test name
* Add pytest as testing framework

Full set of changes: [`0.1.7...0.3.0`](https://gitlab.com/KeNaCo/auto-changelog/compare/0.1.7...0.3.0)