Add support for Monthly Statements

[davibobsin]

Context

Currently, the package only supports getting statements from a limited number of days. However, the Itaú interface allow to fetch statements from a specific month.

Suggestion

In order to allow a historical query of old statements, create a new flux which request statements from a specific month.

Implementations

• Adjust .pre-commit-config.yaml
  • flake8 error due migration
  • pre-commit incompatibilities with isord < 5.12.0
• Implement function feature for get_statements_from_month
• Update tests to cover new feature

[lucasrcezimbra]

Great. Thanks for the contribution.