build(deps): bump serde from 1.0.204 to 1.0.206 #751

Job	Run time
build (1.60.0, armv7a-none-eabi)	2m 16s
test (ubuntu-latest, 1.60.0)	2m 18s
build (1.60.0, thumbv7em-none-eabi)	2m 17s
test (ubuntu-latest, stable)	16s
build (1.60.0, wasm32-unknown-unknown)	2m 22s
test (macos-latest, 1.60.0)	2m 9s
build (stable, armv7a-none-eabi)	18s
test (macos-latest, stable)	13s
build (stable, thumbv7em-none-eabi)	20s
build (stable, wasm32-unknown-unknown)	20s
test (windows-latest, 1.60.0)	3m 3s
test (windows-latest, stable)	51s
	16m 43s

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