deps: update ICU to 64.2
Release Date: April 17th
Fixes: #26388 (closed)
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines
/cc @srl295 @refack @targos
NOTE: This is required to make V8's canary work with Node.js again.