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Merge pull request #665 from nyurik/clippy-support #717

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Job	Run time
Rustfmt	13s
Test (stable)	1m 14s
Test (beta)	1m 15s
Test (nightly)	1m 9s
Test (macos)	1m 17s
Check Documentation	19s
Embedded	12s
Clippy	14s
Test (win32)	2m 49s
Test (win64)	2m 42s
Feature check	19s
Minimal versions	16s
Test (mingw)	2m 36s
MSRV	2m 27s
	17m 2s