[Snyk] Fix for 2 vulnerabilities

[dan-storable]

Snyk has created this PR to fix 2 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• example/requirements.txt

⚠️ Warning

zappa 0.58.0 requires werkzeug, which is not installed.
botocore 1.33.13 has requirement urllib3<1.27,>=1.25.4; python_version < "3.10", but you have urllib3 2.0.7.

Breaking Change Risk

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[dan-storable]

This is a major version upgrade for both Flask and its core dependency, Werkzeug. The upgrade introduces significant breaking changes that require code modifications and thorough testing.

Key Breaking Changes:

Flask (2.2.5 → 3.1.3):

• Dependency Update: Flask 3.0 requires Werkzeug 3.0 or newer, which contains its own set of breaking changes. [1, 4]
• API Removals: Several functions and parameters have been removed and must be replaced:
  • config.from_json() is replaced by config.from_file(..., load=json.load). [3, 4]
  • safe_join() is removed; use werkzeug.utils.safe_join() instead. [3, 4]
  • total_seconds() is removed; use timedelta.total_seconds() instead. [3, 4]
• Python Support: Support for Python 3.7 and 3.8 has been dropped. [4, 5]

Werkzeug (2.2.3 → 3.1.6):

• Password Hashing: The default method for generate_password_hash() has changed to scrypt. [5] Applications using this function for password verification without explicitly setting the method will fail to verify existing passwords.
• Test Client: The test client no longer returns a tuple. Code that accesses response data via index (e.g., response[0]) will break and must be updated to use properties on the TestResponse object. [5]
• URL Module: The werkzeug.urls module is deprecated. [5, 10]

Recommendation: This upgrade requires developer action. Pay close attention to password verification logic if using generate_password_hash. Update test suites to handle the new TestResponse object. Replace all removed Flask APIs with their modern equivalents. Ensure your environment is running Python 3.9 or newer.

Source: Flask Changelog, Werkzeug Changelog

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