Update dependency chardet to v5

This MR contains the following updates:

Package	Type	Update	Change
chardet	ironbank-pypi	major	4.0.0 -> 5.0.0

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Release Notes

chardet/chardet

v5.0.0

Compare Source

⚠️ This release is the first release of chardet that no longer supports Python < 3.6 ⚠️

In addition to that change, it features the following user-facing changes:

• Added a prober for Johab Korean (#​207, @​grizlupo)
• Added a prober for UTF-16/32 BE/LE (#​109, #​206, @​jpz)
• Added test data for Croatian, Czech, Hungarian, Polish, Slovak, Slovene, Greek, and Turkish, which should help prevent future errors with those languages
• Improved XML tag filtering, which should improve accuracy for XML files (#​208)
• Tweaked SingleByteCharSetProber confidence to match latest uchardet (#​209)
• Made detect_all return child prober confidences (#​210)
• Updated examples in docs (#​223, @​domdfcoding)
• Documentation fixes (#​212, #​224, #​225, #​226, #​220, #​221, #​244 from too many to mention)
• Minor performance improvements (#​252, @​deedy5)
• Add support for Python 3.10 when testing (#​232, @​jdufresne)
• Lots of little development cycle improvements, mostly thanks to @​jdufresne

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