Log Message:
py-chardet: update to 5.0.0.

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