Bump pyicu from 2.12 to 2.13 #920

Job	Run time
changes	2s
check-lockfile	5s
lint-crlf	6s
lint-newsfile	0s
lint	1m 35s
check-schema-delta	42s
Typechecking	2m 56s
check-sampleconfig	2m 20s
lint-pydantic	2m 16s
lint-clippy	0s
lint-clippy-nightly	0s
lint-rustfmt	0s
linting-done	4s
calculate-test-jobs	5s
complement (monolith, SQLite)	12m 31s
trial-olddeps	6m 43s
trial-pypy	0s
complement (monolith, Postgres)	13m 28s
portdb (3.8, 11)	3m 25s
complement (workers, Postgres)	20m 8s
portdb (3.11, 15)	3m 19s
cargo-bench	0s
cargo-test	0s
trial (3.8, sqlite, all)	5m 40s
sytest (focal)	9m 35s
trial (3.8, postgres, 11, all)	11m 23s
sytest (focal, postgres)	11m 27s
trial (3.8, sqlite)	4m 29s
sytest (focal, multi-postgres, workers)	15m 34s
sytest (focal, multi-postgres, workers, asyncio)	20m 25s
export-data	2m 58s
tests-done	3s
	2h 31m 19s

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