docs: update readme #520

Job	Run time
Build wasm	2m 3s
Run tests on Linux armv7	4m 5s
Run tests on macOS arm64 (Apple M1)	1m 32s
Run tests on Linux x86 (stable)	1m 17s
Run tests on Linux x86 (stable, no default features)	1m 16s
Run tests on Linux x86 (nightly, no default features)	1m 20s
Run tests on Linux x86 (nightly)	1m 19s
Run tests on Linux arm64	4m 8s
	17m 0s

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