Reduce the package size of uuid #1756

Job	Run time
Tests / Examples	10s
Build / MSRV	2m 15s
Tests / Stable	44s
Build / Clippy	20s
Build / Embedded	13s
Tests / Miri	55s
Build / No deps	1m 4s
Tests / WebAssembly (WASI)	32s
Tests / OS: macos-latest - stable-x86_64-apple-darwin	3m 28s
Tests / WebAssembly (wasm-bindgen)	47s
Tests / OS: ubuntu-latest - stable-x86_64-gnu	1m 25s
Tests / OS: windows-latest - stable-x86_64-gnu	3m 7s
Tests / OS: windows-latest - stable-x86_64-msvc	2m 53s
Tests / OS: macos-latest - beta-x86_64-apple-darwin	3m 44s
Tests / OS: ubuntu-latest - beta-x86_64-gnu	1m 29s
Tests / OS: windows-latest - beta-x86_64-gnu	2m 59s
Tests / OS: windows-latest - beta-x86_64-msvc	2m 30s
Tests / OS: macos-latest - nightly-x86_64-apple-darwin	2m 39s
Tests / OS: ubuntu-latest - nightly-x86_64-gnu	1m 24s
Tests / OS: windows-latest - nightly-x86_64-gnu	3m 1s
Tests / OS: windows-latest - nightly-x86_64-msvc	2m 48s
	38m 27s

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