Update python-rapidjson requirement from <1.20,>=1.18 to >=1.18,<1.21

[dependabot]

Updates the requirements on python-rapidjson to permit the latest version.

Changelog

Sourced from python-rapidjson's changelog.

1.20 (2024-08-05)

* Rectify type hints of ``loads()`` and ``Decoder.__call__()`` (`issue [#214](https://github.com/python-rapidjson/python-rapidjson/issues/214)`__)
__ python-rapidjson/python-rapidjson#214


Ensure Validator receives valid UTF-8 bytes/bytearray arguments


Generate wheels on PyPI using Python 3.13.0rc1 release, thanks to cibuildwheel 2.20.0__
__ https://cibuildwheel.pypa.io/en/stable/changelog/#v2200


1.19 (2024-07-28)

• Properly dump subclasses of float with custom __repr__() method ( issue [#213](https://github.com/python-rapidjson/python-rapidjson/issues/213)__)

  __ python-rapidjson/python-rapidjson#213

1.18 (2024-06-29)

* Expose PEP-484 typing stubs, thanks to Rodion Kosianenko and GoodWasHere (`PR [#204](https://github.com/python-rapidjson/python-rapidjson/issues/204)`__)
__ python-rapidjson/python-rapidjson#204
1.17 (2024-05-18)

• Use current master__ version of rapidjson

  __ Tencent/rapidjson@5e17dbe...ab1842a

• Generate wheels on PyPI using Python 3.13b1 release, thanks to cibuildwheel 2.18.0__

  __ https://cibuildwheel.pypa.io/en/stable/changelog/#v2180

1.16 (2024-02-28)

* Produce Python 3.8 wheels again, I deactivated it too eagerly, it's in *security fixes
  only* mode, not yet reached its `end-of-life` state
1.15 (2024-02-28)
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Commits

• 7600de4 Release 1.20
• 6641472 Use the normalized-name-of-the-month
• d523b54 Update CHANGES.rst
• e1a5d31 Use cibuildwheel 2.20.0
• f30f630 Ensure that Validator receives UTF-8 encoded bytes/bytearray
• 3f85e77 Rectify exception message, including the "file-like" variant
• 6915acc Rectify type hints if loads() and Decoder.call()
• 2b3ffcf Release 1.19
• 5732146 Update CHANGES.rst
• cf1874c Do not use PyObject_Repr() to dump float numbers
• Additional commits viewable in compare view

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