Release 6.1.10

add optional extra dep: pytz (#185)

* add optional extra deps: pytz&tzdata

* fix

* fix ci failed

* trigger ci

* fix

* mention pytz extra installation

* Update Makefile

* mention numba extra installation

* update hooks

* Clarify h3 timezone polygon index

FIX #168

* add pre-commit clean cmd

* Update README.rst

* mention alternative python packages

* Update 3_about.rst

* Update CHANGELOG.rst

* Update pyproject.toml

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Co-authored-by: Jannik Michelfeit <github@michelfe.it>