With major thanks to Qing Lee for the PR that uplifts ucharclasses to
work with 0.99994 and up, a new version of ucharclasses was released
yesterday that should work with the most recent version of Xe(La)TeX.
However, Werner Lemberg also filed a PR to add in Unicode 8.0 block
support to v2.1, which I just merged in, so I will be spinning a v2.2
and sending that off to CTAN later today.
- Pomax
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