Support Unicode 16.0

[data-man]

But one test didn't pass :(

-------------------------------------------------------------------------------
Script extension
-------------------------------------------------------------------------------
/home/dataman/Projects/C/cpp-unicodelib_my/test/test.cpp:359
...............................................................................

/home/dataman/Projects/C/cpp-unicodelib_my/test/test.cpp:360: FAILED:
  REQUIRE( is_script(Script::Hiragana, U'ー') )
with expansion:
  false

===============================================================================
test cases:     39 |     38 passed | 1 failed
assertions: 414868 | 414867 passed | 1 failed

[yhirose]

@data-man thanks for the heads-up! I took a look at the new Unicode character database (UCD), and I found there is a major format change in ScriptExtensions.txt. So the following functions can't generate _script_extension_ids and _script_extension_properties_for_id any more...

• genScriptExtensionIdTable(ucd)
• genScriptExtensionPropertyForIdTable(ucd)

Also we have to compare manually the new Unicode 16.0.0 spec with the previous 15.1.0 (especially the chapter 3 'Conformance', and UAX #29 'Unicode Text Segmentation'), and apply any changes between them to 'unicodelib.h'.

I'll take a look at it this weekend. Thanks!

[yhirose]

I have updated scripts/gen_table.py to support the new ScriptExtensions.txt format at #9.

[data-man]

Thank you!