Re: [whatwg/url] Update to Unicode 16.0.0 (Issue #836)

We considered several issues and made recommendations that the UTC approved.

For example, there were complicated and unnecessary differences in processing with UseSTD3ASCIIRules=true vs. false, and some characters were disallowed based on differences between IDNA2003 and IDNA2008, while (a) IDNA2003 has not been relevant in a long time and (b) transitional processing had been deprecated in Unicode 15.1.

For details see
- Unicode 16 Modifications: https://www.unicode.org/reports/tr46/tr46-33.html#Modifications
- [UTC #178 PAG report](https://www.unicode.org/L2/L2024/24009r-utc178-properties-recs.pdf) pages 23-24
- [UTC #179 PAG report pages](https://www.unicode.org/L2/L2024/24064r2-utc179-properties-recs.pdf) 40-44
    - This includes the reduction of the base exclusion set. See the feedback on pages 41-42 and the proposal starting on page 43.
    - Page 44 has a list of “Changing from "disallowed" to "mapped"” which includes U+2132 TURNED CAPITAL F.
- [UTC #180 PAG report](https://www.unicode.org/L2/L2024/24162-utc180-properties-recs.pdf) pages 33-35

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