[deps] require Python 3.9+

[capcom6]

Summary by CodeRabbit

• Chores
  • Updated project requirements to require Python 3.9 or higher.
  • Removed support for Python 3.7 and 3.8 in documentation and project metadata.
  • Adjusted testing setup to run only on Python 3.9 and above.

[coderabbitai]

Walkthrough

The minimum supported Python version for the project has been raised from 3.7/3.8 to 3.9 across all documentation, configuration, and CI workflows. This includes updating the Python version matrix in the CI workflow, the requirements section in the README, and the version metadata in pyproject.toml.

Changes

File(s)	Summary of Changes
.github/workflows/testing.yml	Removed Python 3.8 from CI test matrix; now tests 3.9–3.13.
README.md	Updated minimum Python version in requirements to 3.9+.
pyproject.toml	Raised requires-python to 3.9; removed 3.7/3.8 classifiers.

Possibly related PRs

• [docs] improve readme #18: Updates and restructures the README, which overlaps with this PR's change to the README's Python version requirement.

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📜 Recent review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 9914cd5 and 480a302.

⛔ Files ignored due to path filters (1)

• Pipfile.lock is excluded by !**/*.lock

📒 Files selected for processing (3)

• .github/workflows/testing.yml (1 hunks)
• README.md (1 hunks)
• pyproject.toml (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (3)

• README.md
• .github/workflows/testing.yml
• pyproject.toml

✨ Finishing Touches

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 4f64911 and 3b17b50.

⛔ Files ignored due to path filters (1)

• Pipfile.lock is excluded by !**/*.lock

📒 Files selected for processing (3)

• .github/workflows/testing.yml (1 hunks)
• README.md (1 hunks)
• pyproject.toml (1 hunks)

🔇 Additional comments (2)

pyproject.toml (1)

8-8: Raise minimum Python version to >=3.9
Updated the requires-python field to enforce Python 3.9+ and removed older version classifiers.

README.md (1)

42-42: Update README requirements to Python 3.9+
The Requirements section now matches the updated project metadata and CI workflow.