The Unicode Standard version 15.0.0 was released this week. As per usual, since the .NET runtime carries a copy of Unicode-derived data, we should update our data files to match this version.

This will affect the following APIs:

• System.Globalization.StringInfo
• System.Globalization.CharUnicodeInfo
• System.Text.Encodings.Web.*
• System.Text.Json.* (since it depends on System.Text.Encodings.Web)

For instructions on how to update the runtime-carried Unicode data files, consult the GenUnicodeProp docs and the STEW docs. Also update the UnicodeUcdVersion data throughout our .csproj files (see samples).

See #44423 for the changes we made to support Unicode 14.0.0 in .NET 7.

There are no interesting changes to UAX #29 for this version of Unicode. Our tools will automatically pick up any changes to a code point's Grapheme_Cluster_Break property, but there should be no changes required to the core logic within TextSegmentationUtility.cs.