Brazilcep

Update copyright and python version

- Change poetry `pyproject.toml` and use default `pyproject.toml` from Python docs
- Improve nox tests and dependencies enviromnents
- Add support to Python 3.12

- Add timeout settings
- Add proxy settings. From: https://github.com/mstuttgart/brazilcep/issues/40
- Add real tests to APICEP and ViaCEP
- Update docs and README
- Deprecated 'Correios' webservice support

- Add timeout parameters in requests
- Update README typing errors

- Rename lib to BrazilCEP
- Create new pip package
- Remove support for Python 3.5, 3.6, and 3.7
- Add support to Python 3.9, 3.10, and 3.11
- Add poetry to manage project dependencies
- Add matrix test of Python versions using nox
- Improve docs and code
- Fix Github actions lint
- Fix Github actions coverage
- Improve lint test
- Improve coverage test
- Create docs site (translate to English)
- Update contribute doc to use poetry

* Corrige: AttributeError: 'NoneType' object has no attribute 'split' ao consultar cep 99999-999
* Adiciona nova exception 'BlockedByFlood' para excesso de consultas
* Melhoras testes adicionando mock as consultas de ViaCEP e ApiCEP