Fix cargo deny warnings and errors #1588

Job	Run time
test_features	21s
test_features (default)	1m 46s
test_avif_decoding	1m 18s
test_features (rayon)	25s
test_other_archs (powerpc-unknown-linux-gnu)	2m 23s
test_features (avif)	55s
test_toolchains (1.67.1)	40s
test_other_archs (i686-unknown-linux-gnu)	1m 22s
test_features (bmp)	47s
test_toolchains (nightly)	1m 0s
test_features (dds)	24s
build_benchmarks	46s
test_features (exr)	42s
test_toolchains (beta)	1m 21s
Fuzz targets (afl)	2m 2s
test_features (ff)	19s
test_features (gif)	27s
Fuzz targets (cargo-fuzz)	52s
test_features (hdr)	39s
clippy	2m 4s
test_features (ico)	30s
public_private_dependencies	23s
test_features (jpeg)	22s
rustfmt	6s
test_features (png)	27s
cargo-deny	18s
test_features (pnm)	32s
test_features (qoi)	21s
cargo-semver-checks	28s
test_features (tga)	25s
test_features (tiff)	44s
test_features (webp)	27s
	25m 36s

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