Tests

Update serde_with requirement from 1.14.0 to 3.6.1 (#1392) #683

Job	Run time
Check doc	1m 4s
test-ios	32s
test-cross (ubuntu-latest, powerpc-unknown-linux-gnu, stable)	1m 18s
test (ubuntu-latest, x86_64-unknown-linux-gnu, stable)	52s
test-miri	2m 50s
test (macos-latest, x86_64-apple-darwin, stable)	1m 36s
test-no-std	13s
test (windows-latest, x86_64-pc-windows-gnu, stable)	2m 15s
test (windows-latest, x86_64-pc-windows-msvc, beta)	2m 0s
test (ubuntu-latest, x86_64-unknown-linux-gnu, MSRV, 1.60.0)	4m 9s
test (ubuntu-latest, sudo apt-get update ; sudo apt install gcc-multilib, i686-unknown-linux-gnu,...	1m 34s
test (ubuntu-latest, x86_64-unknown-linux-gnu, nightly, minimal_versions)	1m 25s
	19m 48s

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