Added conversion for Vec<u8> #1547

Job	Run time
Tests / WebAssembly (wasm-bindgen)	1m 10s
Tests / Stable	1m 27s
Tests / MIPS (Big Endian)	2m 9s
Build / Embedded	17s
Build / MSRV	1m 55s
Build / No deps	1m 17s
Tests / WebAssembly (WASI)	56s
Tests / OS: macos-latest - stable-x86_64-apple-darwin	3m 25s
Tests / OS: ubuntu-latest - stable-x86_64-gnu	2m 19s
Tests / OS: windows-latest - stable-x86_64-gnu	4m 30s
Tests / OS: windows-latest - stable-x86_64-msvc	3m 29s
Tests / OS: macos-latest - beta-x86_64-apple-darwin	4m 18s
Tests / OS: ubuntu-latest - beta-x86_64-gnu	1m 53s
Tests / OS: windows-latest - beta-x86_64-gnu	4m 57s
Tests / OS: windows-latest - beta-x86_64-msvc	3m 17s
Tests / OS: macos-latest - nightly-x86_64-apple-darwin	4m 0s
Tests / OS: ubuntu-latest - nightly-x86_64-gnu	2m 8s
Tests / OS: windows-latest - nightly-x86_64-gnu	7m 31s
Tests / OS: windows-latest - nightly-x86_64-msvc	4m 46s
	55m 44s

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