Merge pull request #272 from Enet4/imp/lossless-bitdepth #306

Job	Run time
build (1.61.0, test)	5m 8s
cross_compile_wasm	1m 1s
build (1.61.0, benchmark)	4m 37s
cross_compile_aarch64 (nightly-2022-03-24)	5m 14s
build (1.61.0, rayon, test)	4m 36s
cross_compile_aarch64 (nightly-2022-03-24, rayon)	4m 55s
build (1.61.0, rayon, benchmark)	4m 27s
cross_compile_aarch64 (nightly-2022-03-24, nightly_aarch64_neon)	4m 59s
build (stable, test)	1m 14s
build (stable, benchmark)	2m 9s
build (stable, rayon, test)	1m 40s
build (stable, rayon, benchmark)	1m 51s
build (beta, test)	1m 38s
build (beta, benchmark)	1m 56s
build (beta, rayon, test)	1m 53s
build (beta, rayon, benchmark)	2m 20s
build (nightly, test)	1m 31s
build (nightly, benchmark)	1m 58s
build (nightly, rayon, test)	2m 15s
build (nightly, rayon, benchmark)	2m 15s
	57m 37s

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