Update dependency fasteners to v0.19

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
fasteners	==0.16.3 -> ==0.19

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Release Notes

harlowja/fasteners (fasteners)

v0.19

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• Add .acquire_read_lock, .release_read_lock, .acquire_write_lock, and
  .release_write_lock methods to the inter thread ReaderWriterLock as was
  promised in the README.
  • Remove support for python 3.7 and pypy 3.7. It should still work, but is no
    longer tested.
  • Add support for pypy 3.10 and python 3.11

v0.18

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• Reshuffle the process lock code and properly document it.
  • Revamp the docs and switch from sphinx to mkdocs
  • Remove difficult to use tread lock features from docs
  • Bring back support for eventlet spawn_n
  • Remove support for python3.6. It should still work, but is no longer tested.

v0.17.3

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• Allow writer to become a reader in thread ReaderWriter lock

v0.17.2

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• Remove unnecessary setuptools pin

v0.17.1

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• Switch to the modern python package build infrastructure

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