Bump zstandard from 0.17.0 to 0.20.0 in /tools

[dependabot]

Bumps zstandard from 0.17.0 to 0.20.0.

Release notes

Sourced from zstandard's releases.

0.20.0

Backwards Compatibility Notes

• This will likely be the last release officially supporting Python 3.6. Python 3.6 is end of life as of 2021-12-23.

Changes

• Bundled zstd library upgraded from 1.5.2 to 1.5.4.
• Use of the deprecated ZSTD_copyDCtx() was removed from the C and Rust backends.

0.19.0

Bug Fixes

• The C backend implementation of ZstdDecompressionObj.decompress() could have raised an assertion in cases where the function was called multiple times on an instance. In non-debug builds, calls to this method could have leaked memory.

Changes

• PyPy 3.6 support dropped; Pypy 3.8 and 3.9 support added.
• Anaconda 3.6 support dropped.
• Official support for Python 3.11. This did not require meaningful code changes and previous release(s) likely worked with 3.11 without any changes.
• CFFI's build system now respects distutils's compiler.preprocessor if it is set. (#179)
• The internal logic of ZstdDecompressionObj.decompress() was refactored. This may have fixed unconfirmed issues where unused_data was set prematurely. The new logic will also avoid an extra call to ZSTD_decompressStream() in some scenarios, possibly improving performance.
• ZstdDecompressor.decompress() how has a read_across_frames keyword argument. It defaults to False. True is not yet implemented and will raise an exception if used. The new argument will default to True in a future release and is provided now so callers can start passing read_across_frames=False to preserve the existing functionality during a future upgrade.
• ZstdDecompressor.decompress() now has an allow_extra_data keyword argument to control whether an exception is raised if input contains extra data. It defaults to True, preserving existing behavior of ignoring extra data. It will likely default to False in a future release. Callers desiring the current behavior are encouraged to explicitly pass allow_extra_data=True so behavior won't change during a future upgrade.

Changelog

Sourced from zstandard's changelog.

0.20.0 (released 2023-02-20)

Backwards Compatibility Notes

• This will likely be the last release officially supporting Python 3.6. Python 3.6 is end of life as of 2021-12-23.

Changes

• Bundled zstd library upgraded from 1.5.2 to 1.5.4.
• Use of the deprecated ZSTD_copyDCtx() was removed from the C and Rust backends.

0.19.0 (released 2022-10-29)

Bug Fixes

• The C backend implementation of ZstdDecompressionObj.decompress() could have raised an assertion in cases where the function was called multiple times on an instance. In non-debug builds, calls to this method could have leaked memory.

Changes

• PyPy 3.6 support dropped; Pypy 3.8 and 3.9 support added.
• Anaconda 3.6 support dropped.
• Official support for Python 3.11. This did not require meaningful code changes and previous release(s) likely worked with 3.11 without any changes.
• CFFI's build system now respects distutils's compiler.preprocessor if it is set. (#179)
• The internal logic of ZstdDecompressionObj.decompress() was refactored. This may have fixed unconfirmed issues where unused_data was set prematurely. The new logic will also avoid an extra call to ZSTD_decompressStream() in some scenarios, possibly improving performance.
• ZstdDecompressor.decompress() how has a read_across_frames keyword argument. It defaults to False. True is not yet implemented and will raise an exception if used. The new argument will default to True in a future release and is provided now so callers can start passing read_across_frames=False to preserve the existing functionality during a future upgrade.
• ZstdDecompressor.decompress() now has an allow_extra_data keyword argument to control whether an exception is raised if input contains extra data. It defaults to True, preserving existing behavior of ignoring extra data. It will likely default to False in a future release. Callers desiring the current behavior are encouraged to explicitly pass

... (truncated)

Commits

• c5833ac global: update version to 0.20.0
• 132b600 docs: capture missing features in own document
• 3b6cd5c docs: document future removal of Python 3.6
• 26261a3 rust: update dependencies
• 170d937 rust-ext: consistently and properly define hint argument to readline()
• c1fa597 global: remove use of deprecated ZSTD_copyDCtx()
• de93ee0 global: reflect upgrade of zstd to 1.5.4
• acfd93d zstd: add cast to some ZSTD_memcpy()
• 8d091ad zstd: upgrade vendored zstd to 1.5.4
• 42e25d0 rust-ext: upgrade zstd-safe and zstd-bytes to latest using zstd 1.5.2
• Additional commits viewable in compare view

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