Bump serde from 1.0.198 to 1.0.200 #1237

Job	Run time
build (stable)	1m 15s
clippy (stable)	2m 5s
build (beta)	2m 14s
clippy (beta)	29s
build (nightly)	1m 1s
clippy (nightly)	1m 15s
build (1.73.0)	2m 34s
clippy (1.73.0)	28s
build (stable minus 1 release)	2m 23s
clippy (stable minus 1 release)	38s
fmt	14s
build (stable minus 2 releases)	2m 22s
clippy (stable minus 2 releases)	40s
test (stable)	2m 21s
test (beta)	2m 33s
test (nightly)	2m 7s
test (1.73.0)	2m 44s
test (stable minus 1 release)	2m 57s
test (stable minus 2 releases)	2m 50s
	33m 10s

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