Upgrade to Python 3.13

[MaxGhenis]

Now that microdf has been updated to support Python 3.13, we should upgrade this repository to support Python 3.13.

Current state

• pyproject.toml specifies: python = ">=3.11, <3.13.0"
• GitHub Actions tests on Python 3.11 and 3.12

Tasks

• Change upper bound from <3.13.0 to <3.14 in pyproject.toml
• Update GitHub Actions workflows to test on Python 3.13
• Test that all functionality works with Python 3.13
• Update any dependencies that may need upgrading for Python 3.13 compatibility