Prepare 1.13.0 release #1177

Job	Run time
Check tokio02 feature	24s
Build and test (ubuntu-latest, nightly)	22s
Build with no-std	13s
Build and test (ubuntu-latest, beta)	23s
Checking fmt and docs	28s
Check io_safety feature (ubuntu-latest)	11s
Build and test (ubuntu-latest, stable)	17s
Check io_safety feature (windows-latest)	14s
Build and test (windows-latest, nightly)	21s
Check wasm targets (nightly)	28s
Cross compile (i686-unknown-linux-gnu)	1m 22s
Build and test (windows-latest, beta)	21s
Check wasm targets (beta)	34s
Build and test (windows-latest, stable)	21s
Cross compile (powerpc-unknown-linux-gnu)	59s
Check wasm targets (stable)	34s
Cross compile (powerpc64-unknown-linux-gnu)	1m 4s
Build and test (macOS-latest, nightly)	22s
Cross compile (mips-unknown-linux-gnu)	1m 5s
Build and test (macOS-latest, beta)	22s
Cross compile (arm-linux-androideabi)	1m 20s
Build and test (macOS-latest, stable)	21s
	12m 6s

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