Bump serde from 1.0.199 to 1.0.202 #890

Job	Run time
check	7m 1s
test-client-matrix	58s
matrix	1m 3s
test-client-check	3m 53s
test-client-clippy	3m 15s
Build test client (x86_64-unknown-linux-musl)	3m 55s
Build test client (i686-unknown-linux-musl)	4m 25s
Build test client (armv7-unknown-linux-musleabihf)	4m 27s
Build test client (aarch64-unknown-linux-musl)	4m 36s
Build test client (x86_64-unknown-freebsd)	3m 59s
Build test client (.exe, x86_64-pc-windows-gnu)	4m 13s
clippy	4m 21s
Check MSRV	5m 23s
tests	8m 20s
build (x86_64-unknown-linux-musl)	7m 36s
build (i686-unknown-linux-musl)	7m 18s
build (armv7-unknown-linux-musleabihf)	8m 19s
build (aarch64-unknown-linux-musl)	8m 59s
build (x86_64-unknown-freebsd)	8m 18s
Package nightly release	13m 48s
	1h 54m 7s

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