Bump serde from 1.0.202 to 1.0.203 #1383

Job	Run time
check-lockfile	5s
changes	2s
lint-newsfile	0s
lint-crlf	5s
lint-clippy	40s
check-schema-delta	0s
lint	0s
check-sampleconfig	0s
lint-clippy-nightly	48s
Typechecking	0s
lint-pydantic	0s
lint-rustfmt	40s
linting-done	2s
portdb (3.8, 11)	2m 55s
portdb (3.11, 15)	3m 15s
calculate-test-jobs	11s
trial-olddeps	7m 36s
complement (monolith, SQLite)	12m 40s
complement (monolith, Postgres)	13m 26s
cargo-bench	0s
complement (workers, Postgres)	20m 28s
cargo-test	0s
trial-pypy	0s
trial (3.8, sqlite, all)	4m 52s
sytest (focal)	8m 52s
trial (3.8, postgres, 11, all)	10m 49s
sytest (focal, postgres)	10m 27s
trial (3.8, sqlite)	4m 49s
sytest (focal, multi-postgres, workers)	13m 35s
sytest (focal, multi-postgres, workers, asyncio)	19m 50s
export-data	2m 12s
tests-done	4s
	2h 18m 23s

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