Bump serde from 1.0.204 to 1.0.207 #5512

Job	Run time
Check	31s
coverage	9m 56s
Lints (beta)	38s
Lints (stable)	33s
test (beta)	1m 37s
test_all_features	13m 25s
test (stable)	1m 35s
test (windows)	3m 23s
test (macos)	1m 24s
Check if cbindgen runs cleanly for generating the C headers	8m 28s
minimum_rust_version	7m 56s
Publish (dry-run)	8m 12s
Run tests under wasm32-wasi	1m 16s
Check if wasm-pack builds a valid package for the sourmash crate	1m 25s
	1h 0m 19s

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