⬆️ Update chardet requirement from <6.0.0,>=5.0.0 to >=5.0.0,<8.0.0

[dependabot]

Updates the requirements on chardet to permit the latest version.

Release notes

Sourced from chardet's releases.

7.0.0

Ground-up, MIT-licensed rewrite of chardet. Same package name, same public API — drop-in replacement for chardet 5.x/6.x. Just way faster and more accurate!

Highlights:

• MIT license (previous versions were LGPL)
• 96.8% accuracy on 2,179 test files (+2.3pp vs chardet 6.0.0, +7.7pp vs charset-normalizer)
• 41x faster than chardet 6.0.0 with mypyc (28x pure Python), 7.5x faster than charset-normalizer
• Language detection for every result (90.5% accuracy across 49 languages)
• 99 encodings across six eras (MODERN_WEB, LEGACY_ISO, LEGACY_MAC, LEGACY_REGIONAL, DOS, MAINFRAME)
• 12-stage detection pipeline — BOM, UTF-16/32 patterns, escape sequences, binary detection, markup charset, ASCII, UTF-8 validation, byte validity, CJK gating, structural probing, statistical scoring, post-processing
• Bigram frequency models trained on CulturaX multilingual corpus data for all supported language/encoding pairs
• Optional mypyc compilation — 1.49x additional speedup on CPython
• Thread-safe detect() and detect_all() with no measurable overhead; scales on free-threaded Python 3.13t+
• Negligible import memory (96 B)
• Zero runtime dependencies

Breaking changes vs 6.0.0:

• detect() and detect_all() now default to encoding_era=EncodingEra.ALL (6.0.0 defaulted to MODERN_WEB)
• Internal architecture is completely different (probers replaced by pipeline stages). Only the public API is preserved.
• LanguageFilter is accepted but ignored (deprecation warning emitted)
• chunk_size is accepted but ignored (deprecation warning emitted)

Changelog

Sourced from chardet's changelog.

7.0.0 (2026-03-02)

Ground-up, MIT-licensed rewrite of chardet. Same package name, same public API — drop-in replacement for chardet 5.x/6.x.

Highlights:

• MIT license (previous versions were LGPL)
• 96.8% accuracy on 2,179 test files (+2.3pp vs chardet 6.0.0, +7.7pp vs charset-normalizer)
• 41x faster than chardet 6.0.0 with mypyc (28x pure Python), 7.5x faster than charset-normalizer
• Language detection for every result (90.5% accuracy across 49 languages)
• 99 encodings across six eras (MODERN_WEB, LEGACY_ISO, LEGACY_MAC, LEGACY_REGIONAL, DOS, MAINFRAME)
• 12-stage detection pipeline — BOM, UTF-16/32 patterns, escape sequences, binary detection, markup charset, ASCII, UTF-8 validation, byte validity, CJK gating, structural probing, statistical scoring, post-processing
• Bigram frequency models trained on CulturaX multilingual corpus data for all supported language/encoding pairs
• Optional mypyc compilation — 1.49x additional speedup on CPython
• Thread-safe detect() and detect_all() with no measurable overhead; scales on free-threaded Python 3.13t+
• Negligible import memory (96 B)
• Zero runtime dependencies

Breaking changes vs 6.0.0:

• detect() and detect_all() now default to encoding_era=EncodingEra.ALL (6.0.0 defaulted to MODERN_WEB)
• Internal architecture is completely different (probers replaced by pipeline stages). Only the public API is preserved.
• LanguageFilter is accepted but ignored (deprecation warning emitted)
• chunk_size is accepted but ignored (deprecation warning emitted)

6.0.0 (2026-02-22)

Features:

• Unified single-byte charset detection with proper language-specific bigram models for all single-byte encodings (replaces Latin1Prober and MacRomanProber heuristics)
• 38 new languages: Arabic, Belarusian, Breton, Croatian, Czech, Danish, Dutch, English, Esperanto, Estonian, Farsi, Finnish, French, German, Icelandic, Indonesian, Irish, Italian, Kazakh, Latvian, Lithuanian,

... (truncated)

Commits

• 4b89d62 Reach 100% test coverage across all chardet modules
• d0896b1 Add CLI, confusion, models, and script utility tests
• dba8d66 Add tests for uncovered branches across pipeline modules
• 6ef5eda refactor: remove dead code branches and add pragma for invariant assertion
• f91071f docs: add test coverage gap implementation plan
• 692c6d5 docs: add test coverage gap analysis and improvement design
• e01e148 Add known failure entries for new DOS codepage test files
• d9f1f3c Remove known failure entries for deleted duplicate test files
• 3f1495f Allow symlink tests/data to simplify updating test-data repo
• dabd85b Make tests/data get ignored if it is a symlink too
• Additional commits viewable in compare view

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