Circuit changes draft #223

Job	Run time
Bitrot check	1m 32s
Book tests	3m 47s
Intra-doc links	4m 0s
Rustfmt	12s
Build target wasm32-unknown-unknown	4m 36s
Build target wasm32-wasi	4m 3s
Test on ubuntu-latest	10m 11s
Test on i686-unknown-linux-gnu	15m 59s
Test on windows-latest	12m 21s
Test on i686-unknown-linux-gnu with beta features	16m 7s
Test on macOS-latest	13m 14s
Test on i686-unknown-linux-gnu with nightly features	17m 50s
Test on ubuntu-latest with beta features	9m 45s
Test on windows-latest with beta features	12m 56s
Test on macOS-latest with beta features	15m 19s
Test on ubuntu-latest with nightly features	10m 51s
Test on windows-latest with nightly features	13m 49s
Test on macOS-latest with nightly features	11m 1s
	2h 57m 33s

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