Update serde_with requirement from 1.14.0 to 3.6.1 #675

Job	Run time
Check doc	1m 9s
test-ios	34s
test (ubuntu-latest, x86_64-unknown-linux-gnu, stable)	56s
test-cross (ubuntu-latest, powerpc-unknown-linux-gnu, stable)	1m 30s
test (macos-latest, x86_64-apple-darwin, stable)	1m 30s
test-miri	2m 52s
test-no-std	14s
test (windows-latest, x86_64-pc-windows-gnu, stable)	2m 33s
test (windows-latest, x86_64-pc-windows-msvc, beta)	2m 9s
test (ubuntu-latest, x86_64-unknown-linux-gnu, MSRV, 1.60.0)	4m 7s
test (ubuntu-latest, sudo apt-get update ; sudo apt install gcc-multilib, i686-unknown-linux-gnu,...	1m 43s
test (ubuntu-latest, x86_64-unknown-linux-gnu, nightly, minimal_versions)	1m 24s
	20m 41s

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