Track permissions as bytes #686

Job	Run time
Rustfmt	5s
Test (ubuntu-20.04, stable)	3m 6s
Test (ubuntu-20.04, beta)	3m 2s
Test (ubuntu-20.04, nightly)	4m 5s
iOS (aarch64-apple-ios, iphoneos)	41s
iOS (x86_64-apple-ios, iphonesimulator)	2m 21s
Windows AArch64	1m 11s
Build Targets (wasm32-unknown-unknown)	22s
Build Targets (wasm32-wasi)	26s
Build Targets (x86_64-unknown-fuchsia)	26s
Build Targets (x86_64-fortanix-unknown-sgx)	22s
Build Targets (x86_64-unknown-illumos)	29s
Docker (aarch64-unknown-linux-gnu)	1m 7s
Docker (arm-unknown-linux-gnueabihf)	1m 8s
Docker (armv7-unknown-linux-gnueabihf)	1m 6s
Docker (i586-unknown-linux-gnu)	54s
Docker (i686-unknown-linux-gnu)	49s
Docker (powerpc64-unknown-linux-gnu)	1m 26s
Docker (s390x-unknown-linux-gnu)	1m 14s
Docker (x86_64-pc-windows-gnu)	1m 13s
Docker (x86_64-unknown-linux-gnu)	42s
Docker (x86_64-unknown-linux-musl)	45s
Docker (arm-linux-androideabi)	2m 4s
Docker (armv7-linux-androideabi)	2m 8s
Docker (aarch64-linux-android)	1m 44s
Docker (i686-linux-android)	2m 18s
Docker (x86_64-linux-android)	2m 1s
Miri	3m 49s
MSRV	53s
	41m 57s

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