update decomposition #216

Job	Run time
Bitrot check	1m 31s
Build target wasm32-unknown-unknown	4m 13s
Book tests	3m 47s
Build target wasm32-wasi	4m 4s
Intra-doc links	3m 53s
Rustfmt	15s
Test on i686-unknown-linux-gnu	15m 58s
Test on ubuntu-latest	9m 30s
Test on i686-unknown-linux-gnu with beta features	15m 29s
Test on windows-latest	12m 23s
Test on i686-unknown-linux-gnu with nightly features	17m 38s
Test on macOS-latest	13m 26s
Test on ubuntu-latest with beta features	9m 44s
Test on windows-latest with beta features	12m 16s
Test on macOS-latest with beta features	10m 57s
Test on ubuntu-latest with nightly features	10m 41s
Test on windows-latest with nightly features	13m 41s
Test on macOS-latest with nightly features	11m 2s
	2h 50m 28s

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