Prepare 1.13.0 release #1179

Job	Run time
Check tokio02 feature	19s
Checking fmt and docs	29s
Build with no-std	11s
Build and test (ubuntu-latest, nightly)	21s
Check io_safety feature (ubuntu-latest)	16s
Build and test (ubuntu-latest, beta)	22s
Check wasm targets (nightly)	35s
Check io_safety feature (windows-latest)	19s
Build and test (ubuntu-latest, stable)	19s
Cross compile (i686-unknown-linux-gnu)	1m 15s
Check wasm targets (beta)	33s
Build and test (windows-latest, nightly)	1s
Cross compile (powerpc-unknown-linux-gnu)	1m 11s
Check wasm targets (stable)	29s
Build and test (windows-latest, beta)	19s
Cross compile (powerpc64-unknown-linux-gnu)	1m 16s
Build and test (windows-latest, stable)	1s
Cross compile (mips-unknown-linux-gnu)	1m 5s
Cross compile (arm-linux-androideabi)	1m 22s
Build and test (macOS-latest, nightly)	23s
Build and test (macOS-latest, beta)	25s
Build and test (macOS-latest, stable)	22s
	11m 53s

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