Update dependency cffi to v1.17.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
cffi (source, changelog)	==1.17.0 -> ==1.17.1

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Release Notes

python-cffi/cffi (cffi)

v1.17.1

Compare Source

• Fix failing distutils.msvc9compiler imports under Windows (#​118).
• ffibuilder.emit_python_code() and ffibuiler.emit_c_code() accept file-like objects (#​115).
• ffiplatform calls are bypassed by ffibuilder.emit_python_code() and ffibuilder.emit_c_code() (#​81).

Full Changelog: python-cffi/cffi@v1.17.0...v1.17.1

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