Add necessary features for ZSA integration #507

Job	Run time
Book tests	2m 2s
Bitrot check	1m 28s
Build target wasm32-unknown-unknown	2m 29s
Build target wasm32-wasi	2m 16s
Code coverage	2m 24s
Intra-doc links	2m 7s
Rustfmt	14s
Test on i686-unknown-linux-gnu	21m 36s
Test on ubuntu-latest	11m 3s
Test on i686-unknown-linux-gnu with beta features	21m 46s
Test on windows-latest	14m 42s
Test on i686-unknown-linux-gnu with nightly features	21m 45s
Test on macOS-latest	9m 12s
Test on ubuntu-latest with beta features	10m 45s
Test on windows-latest with beta features	15m 9s
Test on macOS-latest with beta features	8m 38s
Test on ubuntu-latest with nightly features	11m 33s
Test on windows-latest with nightly features	15m 23s
Test on macOS-latest with nightly features	9m 18s
	3h 3m 50s

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