v0.2.0

Tolerant key parsing, alphanumeric CNPJ and typespecs.

• Formatted Pix keys are accepted and written in the DICT canonical form:
  123.456.789-09 → 12345678909, +55 (11) 98765-4321 → +5511987654321,
  Fulano@Exemplo.com → fulano@exemplo.com
• Alphanumeric CNPJ keys (Receita, from July 2026): 12.ABC.345/01DE-35 → 12ABC34501DE35
• New :key_type option (:cpf, :cnpj, :phone, :email, :evp)
• @spec and @type for the whole public API
• Invalid UTF-8 input now returns {:error, _} instead of raising

Breaking: encode/1 now validates CPF/CNPJ check digits, so keys like "12345678901" return {:error, :invalid_key}. A +55 phone key needs a DDD and 8 or 9 digits.

Full list in the CHANGELOG.

Hex: https://hex.pm/packages/pix_brcode/0.2.0