`cnpj-val` v3

[juliolmuller]

Version 3+ will be structured similarly yo the PHP and Python version of the packages:

• Main component should be object-oriented, so a class should wrap the logic of validating CNPJ.
• Add support to alphanumeric CNPJ ([cnpj-val] Update package to support alphanumeric CNPJ #20)
• Create custom errors for ALL exepcted errors.
• Validate and parse arguments, when possible, and throw a custom TypeError.
• The following components are now expeced to be exported from the final bundle:
  • CnpjValidator (base class)
  • cnpjVal (should be a bound function of the isValid method of a default instance).
  • CnpjValidatorTypeError (abstract)
  • CnpjValidatorInputTypeError
  • CnpjValidatorException (abstract)
• Update unit tests
• Update documentation