* added black to develop guide
* no need for pep8radius.
* changelog.
* Add pre-commit checkbox.
* Add pre-commit to dev reqs.
* Add pyproject.toml for black.
* Pre-commit config.
* Add black to travis and dev reqs.
* Install and run black in travis.
* Remove black from dev reqs.
* Lower black target version.
* Re-format with black.
* Switch to psycopg2 parse_dsn instead of urlparse
* Added wronglink to contributors and updated changelog
* Fix test codestyle
* Support for PGPORT customization in tests
* Support for PGPORT customization in tests
* Refactored PGExecute init and moved short_host generation to object property
* Fix test util codestyle
* Fix local tests run
* Store PGExecute initial params in _conn_params and added PGExecute.copy method
* Fix codestyle
* Added docstring to PGExecute.copy() method