test

Bump serde from 1.0.197 to 1.0.200 #271

Job	Run time
Build & test (ubuntu-latest, stable)	38s
Build & test (ubuntu-latest, beta)	43s
Build & test (ubuntu-latest, nightly)	44s
Check it compiles on old Rust (1.31.0)	1m 49s
Build & test (macos-latest, stable)	41s
Verify benchmarks compile	1m 1s
Build & test (macos-latest, beta)	47s
Build & test (macos-latest, nightly)	44s
Run the big ignored tests	1m 13s
32bit tests	39s
Build & test (windows-latest, stable)	2m 55s
Build & test (windows-latest, beta)	1m 31s
Clippy lints	26s
Build & test (windows-latest, nightly)	2m 32s
Test with experimental-thread-local	45s
Check documentation links	7s
Miri checks	8m 6s
Check formatting	5s
Check it compiles on old Rust (1.45.0)	10s
Thread Sanitizer checks MacOS	15s
	25m 51s

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