Asio support for int24 #936

Job	Run time
clippy-test	44s
rustfmt-check	7s
ubuntu-test	34s
android-apk-build	1m 35s
android-check	41s
asmjs-wasm32-test (wasm32-unknown-emscripten)	52s
cargo-publish	0s
linux-check-and-test-armv7	1m 52s
macos-test	1m 31s
wasm32-bindgen-test (wasm32-unknown-unknown)	20s
wasm32-wasi-test (wasm32-wasi)	15s
ios-build	6m 15s
wasm-beep-build	30s
windows-test (x86_64)	2m 2s
windows-test (i686)	5m 30s
	22m 48s

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