chore(deps): bump serde from 1.0.204 to 1.0.208 #178

Job	Run time
Compile for Windows-x86_64 with Rust stable	3m 29s
Compile for FreeBSD-x86_64 with Rust stable	1m 41s
Compile for Linux-i686 with Rust stable	2m 7s
Compile for Linux-x86_64 with Rust stable	1m 32s
Compile for Linux-arm with Rust stable	2m 14s
Compile for Linux-armhf with Rust stable	1m 50s
Compile for Linux-aarch64 with Rust stable	1m 59s
Compile for macOS-x86_64 with Rust stable	1m 34s
Compile for macOS-aarch64 with Rust stable	1m 50s
Publish repository release	0s
Publish crate.io release	0s
	18m 16s

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