Brazilcep

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- Fixed `AttributeError: 'NoneType' object has no attribute 'split'` when querying CEP `99999-999`
- Added new exception `BlockedByFlood` for excessive queries
- Improved tests by adding mocks for ViaCEP and ApiCEP queries

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- Added support for Python 3.8
- Integrated Correios and APICEP.com webservices for CEP queries
- Introduced new exceptions for better error handling
- Removed deprecated methods and exceptions
- Removed unused `get_cep_from_address` function
- Centralized usage examples in README
- Adopted Tox for testing across Python versions
- Added new tests and improved coverage

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- Fixed `AttributeError: 'ConnectionError' object has no attribute 'message'`

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- Fixed `get_cep_from_address` error key - Thanks to Hendrix Costa (https://github.com/hendrixcosta)
- Updated documentation

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- Fixed usage example for `get_cep_from_address`
- Fixed `KeyError` exception when address not found - Thanks to Patrick Ferraz (https://github.com/patricksferraz)
- Added error handling for `status_code=200` - Thanks to Bruno Mello (https://github.com/bgmello)

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- Fixed `travis.yml` deployment issues