Update dependency timezonefinder to v8

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
timezonefinder	==6.6.3 -> ==8.1.0

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Release Notes

jannikmi/timezonefinder (timezonefinder)

v8.1.0

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• add the support of using the TimeZonefinder class instances as context managers. added a basic usage examples
• note that the performance of certain_timezone_at() degraded drastically, since now many more polygons will be checked with an expensive point-in-polygon algorithm. consider using timezone_at() or timezone_at_land() instead.
• introduced hybrid shortcut index structure that combines the functionality of separate shortcuts and unique shortcuts into a single optimized data structure, improving performance and reducing memory usage
• zone id storage now defaults to uint8 and can be overridden via --zone-id-dtype/TIMEZONEFINDER_ZONE_ID_DTYPE when recompiling binaries
• relax cffi upper bound to allow the 2.x series so downstream packages pinning cffi>=2.0 resolve cleanly
• scripts/reporting.py can now be executed as a standalone script to generate data reports from binary files independent from file_converter.py
• the check_speed_*.py scripts now generates a detailed performance reports in reStructuredText format automatically included into documentation

Internal:

• using abi3 (aka Python limited API) wheels to avoid a combinatory explosion with Python version. It allows the use of a single Python 3.9 base and building future-proof wheels. Thanks to theirix <https://github.com/theirix>__
• using pydantic to validating and parsing the GeoJSON dataset. Thanks to ARYAN RAJ <https://github.com/nikkhilaaryan>__ for the PR.
• refactored file_converter.py to improve code quality. Thanks to Pratyush Kumar <https://github.com/pratyushkumar211>__ for the PR.
• consolidated shortcut data structures: replaced shortcuts.fbs file with hybrid_shortcuts_uint8.fbs (or hybrid_shortcuts_uint16.fbs) file that stores both polygon lists and direct zone IDs using the minimal dtype for zone IDs.

v8.0.0

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• starting from this release, timezonefinder uses the reduced timezones-now dataset version (cf. GitHub Discussion <https://github.com/jannikmi/timezonefinder/discussions/323>__ )
• in this dataset version, all timezones which agree on timekeeping methods as of the release date of the dataset, are merged into one zone (cf. Dataset Documentation <https://github.com/evansiroky/timezone-boundary-builder?tab=readme-ov-file#same-since-now>__ ). This results in a reduced set of ~90 timezones instead of >440 timezones and a reduced memory footprint of the package.
• If you used timezonefinder for localisation beyond the timezone behavior, it might become necessary for you to individually parse the full original dataset version using the parse_data.sh script.
• extended the parse_data.sh script to support downloading the timezones-now Dataset
• adapted tests to the reduced dataset version

v7.0.2

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• exclude tests package closing issue #​330

v7.0.1

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• hit PyPI project size limit. triggering re-upload to fix missing sdist in 7.0.0 release.
• deleted all PyPI releases up to version 3.4.2 (last version supporting python 2.7) to free up project space

v7.0.0

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• Simplified API for end-users, reducing redundant code

• Added global functions that use a shared TimezoneFinder instance:

  • timezone_at
  • timezone_at_land
  • unique_timezone_at
  • certain_timezone_at
  • get_geometry

• Documented usage and warned about thread safety considerations for global functions

• Updated command line interface to use global functions where appropriate

• breaking API Changes: clarified naming. renamed "boundary" to "bbox". renamed "polygon" to "boundary". boundaries (the outer polygon defining part of a timezone) and holes are both polygons so hence the name "polygon" is ambiguous.

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