Release of 2.2.0

[zulquer]

This pull request introduces version 2.2.0 of the multisafepay package, focusing on improved monetary calculation precision, enhanced webhook validation, code quality fixes, and better import organization. Below are the most important changes:

Monetary calculations and precision:

• Implemented Decimal precision for monetary calculations, ensuring more accurate handling of financial amounts.

Bug fixes and validation:

• Fixed webhook validation to correctly handle payloads containing Unicode characters.
• Improved consistency of type annotations between fields and methods throughout the codebase.
• Addressed multiple code quality issues by applying ruff linting fixes.

Code organization:

• Enhanced import organization and structure for better maintainability and readability.

Version update:

• Updated package version to 2.2.0 in pyproject.toml.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.62%. Comparing base (8cf684c) to head (9187704).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #44   +/-   ##
=======================================
  Coverage   90.62%   90.62%           
=======================================
  Files         144      144           
  Lines        2539     2539           
=======================================
  Hits         2301     2301           
  Misses        238      238           

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