Update ICU4X to 2.2 #2184

Job	Run time
Test feature matrix	1m 22s
Test (stable, ubuntu-latest)	39s
Lint	34s
MSRV	12s
Test (stable, macos-latest)	59s
Documentation	34s
Test (stable, windows-latest)	1m 14s
Test FFI (stable, ubuntu-latest)	1m 8s
	6m 42s

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