feat: Add support for alphanumeric CNPJ - #51
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This commit introduces support for alphanumeric CNPJs, which are planned to be introduced in Brazil in 2026. The changes include: - A new helper function `_get_char_value` to convert alphanumeric characters to their corresponding integer values for the validation algorithm. - Updated `validar_cnpj` and `formata_cnpj` to correctly handle alphanumeric characters. - Added new unit tests to verify the validation and formatting of alphanumeric CNPJs.
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This commit introduces support for alphanumeric CNPJs, which are planned to be introduced in Brazil in 2026.
The changes include:
_get_char_valueto convert alphanumeric characters to their corresponding integer values for the validation algorithm.validar_cnpjandformata_cnpjto correctly handle alphanumeric characters.