upstream update #552

Job	Run time
Build target wasm32-unknown-unknown	2m 34s
Book tests	2m 12s
Build target wasm32-wasi	2m 27s
Bitrot check	32s
Code coverage	3m 36s
Intra-doc links	2m 18s
Rustfmt	27s
Test on ubuntu-latest	8m 0s
Test on i686-unknown-linux-gnu	14m 24s
Test on windows-latest	11m 39s
Test on i686-unknown-linux-gnu with beta features	13m 52s
Test on macOS-latest	7m 58s
Test on i686-unknown-linux-gnu with nightly features	16m 39s
Test on ubuntu-latest with beta features	8m 12s
Test on windows-latest with beta features	11m 25s
Test on macOS-latest with beta features	7m 41s
Test on ubuntu-latest with nightly features	8m 55s
Test on windows-latest with nightly features	12m 22s
Test on macOS-latest with nightly features	8m 34s
	2h 23m 47s

Provide feedback