ci: Make rustfmt and clippy happy (#279) #644

Job	Run time
test (x86_64-unknown-linux-gnu, stable)	7m 43s
test (x86_64-unknown-linux-gnu, nightly)	7m 24s
test (i686-unknown-linux-gnu, stable)	1m 13s
test (i686-unknown-linux-gnu, nightly)	1m 29s
test (aarch64-unknown-linux-gnu, stable)	1m 18s
test (aarch64-unknown-linux-gnu, nightly)	1m 29s
test (armv7-unknown-linux-gnueabihf, stable)	1m 11s
test (armv7-unknown-linux-gnueabihf, nightly)	1m 26s
test (riscv64gc-unknown-linux-gnu, stable)	1m 20s
test (riscv64gc-unknown-linux-gnu, nightly)	1m 23s
test (s390x-unknown-linux-gnu, stable)	1m 21s
test (s390x-unknown-linux-gnu, nightly)	1m 44s
test (x86_64-apple-darwin, stable)	3m 48s
test (x86_64-apple-darwin, nightly)	3m 59s
test (aarch64-apple-darwin, stable)	2m 58s
test (aarch64-apple-darwin, nightly)	3m 8s
test (x86_64-pc-windows-gnu, stable)	3m 57s
test (x86_64-pc-windows-gnu, nightly)	3m 29s
test (x86_64-pc-windows-msvc, stable)	5m 25s
test (x86_64-pc-windows-msvc, nightly)	5m 7s
test (i686-pc-windows-gnu, stable)	8m 23s
test (i686-pc-windows-gnu, nightly)	9m 0s
test (i686-pc-windows-msvc, stable)	6m 27s
test (i686-pc-windows-msvc, nightly)	5m 22s
	1h 30m 4s

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